The statute provides that “all murder perpetrated by means of poison, or by lying in wait, or by any other kind of willful, deliberate and premeditated killing, * * shall be murder in the first degree.” Under this classification actual express malice must be proved in order to constitute murder in the first degree. The proof may be by direct testimony as to the repeated declarations of the accused that he entertained the intent" and would carry it into execution, or it may be that equally satisfactory and convincing proof may be found in acts of preparation with deliberation, in coolness in execution, and in subsequent declarations.
Counsel for the accused requested the court to charge that malice could not be implied from the killing alone. The court charged that “if a willful, deliberate and premeditated killing is proved the law will imply malice.” This was in effect to say that if the proof satisfied each juror beyond a reasonable doubt that it had been the deliberate will and intent of the accused to take the life of his victim, they would have legal ground for a verdict of murder in the first degree. This furnishes the accused no ground for complaint.
As tending to prove malice on the part of the “accused towards his victim at the time of the homicide, the state offered evidence tending to prove that thirteen years since he had said that “he would like to put a ball through his father’s heart if he thought it would penetrate, but his heart was so much harder than the ball that he thought it would not penetrate it.” This was received against the objection that it was too remote in time, and was followed by evidence as to threats made one, three and four years since. The objection does not properly go to the admission, but to the weight of the testimony. No rule of limitation runs against evidence as to malice in such cases. Jurors are presumed to know, and the court from abundant caution will remind them, that with time hatred and revenge usually die out of the heart; that a *337threat unrepeated and unexecuted for thirteen years probably comes at last to represent a passion of little strength; that a threat repeated from time to time during as many years and at last fully executed may represent a passion of great strength.
The accused introduced a witness, an expert, upon the point of insanity, and the court permitted an expert to testify upon the same subject in behalf of the state by way of rebuttal. The accused complains of this, and urges that the state should have introduced this evidence in chief. The complaint is without foundation. The law presumes every person of mature years to be of sound mind and competent to commit crime. If the defence be insanity, it is to be proved substantially as an independent fact, and the burden of proof is on the accused. Upon this issue he goes forward and the state rebuts.
Upon the trial a physician, an expert in the science of insanity, was introduced for the purpose of proving that the accused was of unsound mind at the time of the homicide. As a part of his argument upon this branch of the case counsel for the defence asked permission to read to the jury some extracts from a book entitled “Ray’s Medical Jurisprudence of Insanity.” Upon the objection that this was an opinion not under oath, the court refused permission to read. Of this the accused coinplains.
The plea of insanity interposed in behalf of persons indicted is supported by the testimony of persons who by study of books and men have entitled themselves to speak as experts in that science. By way of vindication of their right to be heard as instructors of the jury, they usually preface their testimony by a statement of the extent of their experience in the treatment of persons afflicted with disease of the mind and the time given to the reading of treatises upon insanity written by men of wide experience and acknowledged ability in the treatment of such diseases; their opinion is the result of observation of men and reading of books. And in this jurisdiction for a long series of years counsel have been permitted to read to the jury, as a part of their argument *338upon this part of their case, extracts from such treatises as by the testimony of experts have been accepted by the profession as authority upon that subject; such treatises as have helped to form the opinion expressed by the expert. The practice by repetition has hardened into a rule; a rule, upon the continued existence of which counsel for the accused in the case before us had a right to rely; the abrogation of which by the ruling complained of may have been a surprise. The question is not, shall such reading be now for the first time permitted; it is, shall it now for the first time be forbidden without notice. We think that privileges hitherto granted to persons in like circumstances with the accused should not be denied to him, to his possible prejudice.
Counsel for the accused asked permission to read, as a part of his argument to the jury upon the same point, the opinion of this court in State v. Andersen, 43 Conn., 514. He was permitted to read from it so far as questions of law are therein determined, but was not permitted to read in connection therewith the statement of the facts of that case therein contained. He complains of this restriction.
In that opinion the court says as follows:—“We will not undertake to say that the conduct above referred to as characterizing one who is afflicted with moral mania is exactly the conduct of the prisoner; but the description is certainly applicable to, some extent, and when we consider that the manifestations of insanity are as various as characters and temperaments, that the insane man is not careful to walk in the footsteps of those who have gone before him, but wanders through moral or intellectual darkness, or both, and makes 1ns own path, we are by no means clear that a jury might not with perfect propriety find that the prisoner is morally insane. Upon this point the newly discovered evidence bears with peculiar force and materially strengthens the evidence given upon the trial. It is true that courts have hitherto been slow to recognize this form of insanity as an excuse for crime; nevertheless, that it exists, is well understood, and in some cases is clearly defined by medical and scientific men, cannot be denied.”
*339The statute provides that “ the court shall state its opinion to the jury upon all questions of law arising in the trial of a criminal cause, and submit to their consideration both the law and the facts, without any direction how to find their verdict.” The jury having statutory power to determine the law of his case, the accused had the right to read to them the determination of this court upon points affecting him, in such manner as to give them the most complete knowledge of its precise scope and meaning; and we think that would be best accomplished by presenting the opinion in its integrity. Of course, the facts to a greater or less degree illustrate the statement of the law, and in some paragraphs the two are so closely interwoven that a separation would weaken and perhaps destroy the force of the latter.
In his motion in error the accused specially assigns as error that the court pronounced sentence of death upon him before ruling and passing upon the written motion for a new trial which he had presented.
There is no error in this. By our practice the judgment is not necessarily suspended by the presentment of a motion for a new trial. Usually final judgment is rendered and after-wards the motion is allowed. The statute, in forbidding the infliction of capital punishment within twelve months after.conviction, stays the execution in this case.
A new trial is advised.
In this opinion Granger and Martin, Js., concurred.
Loomis, J.The ruling complained of, by which counsel! were prevented from reading to the jury during the argument from “Ray’s Medical Jurisprudence of Insanity,” the author’s opinions and views on the subject of moral insanity, I regard as correct in principle and in full accord with the best considered legal authorities.
1. It was correct in principle, because the subject matter-belonged exclusively to the realm of fact and not of law.. It was a matter of evidence to be given to the jury under the sanction of an oath, and subject also to that other- most important test of truth, the right of cross-examination. This-*340■wholesome principle ought not to be sacrificed except for most cogent reasons. And what reason is given in this instance ? Only that a different practice for some years has prevailed. Not a practice ever sanctioned, directly or indirectly, by this court, nor one which has generally been considered by the judges on the circuit as of binding force in law, but rather as subject to the discretion of the presiding judges; a discretion which, it is true, has been usually exercised in favor of the accused in capital trials. But, as I understand it, the practice has been under important limitations not existing, or at least not stated, in this case.
It has been usual first to inquire of some witness on the stand as an expert, whether the book to be afterwards read from was recognized by experts as a standard authority on the subject. Were this foundation laid, the practice of reading would be shorn of most of its mischief. And so it would .if .it was subject to the discretion of the court. But the majority opinion unfortunately recognizes no discretion in the court. Otherwise no new trial would have been granted on this ¡account,'for error cannot be predicated of matters of discretion.
¡It is easy 'to see what mischief may result from an unrestricted .license to read such books as counsel choose to read, if only they relate to the case. Books may be crazy as well as men, and all sorts of theories relative to responsibility for crime are advocated in books.
I do not contend that the book offered in this case was of .this class; I concede it to be on the contrary a work of high .repute. But I 'have a right to test the consequences of this departure both from principle and practice by the above supposition. Who is to decide what books may be read if you take away the discretionary power of the court, unless indeed you restore what I contend was a feature of the practice .referred to, namely, that a foundation must first be laid for the reading in the manner I have stated. It may be suggested that there was in the present c.ase .no need of having any expert testify as to the authority of “Ray!s Medical Jurisprudence of Insanity,” because it wasiso .well .known. But the *341principle required it, because courts do not take judicial notice of standard medical or scientific works, and the standard works of to-day may not long continue such, owing to new discoveries and advancing knowledge.
2. Again, I contend that the ruling of the court below was in accordance with the best legal authorities.
The case of Commonwealth v. Wilson, 1 Gray, 338, is directly in point. It was an indictment for murder, and the sole ground of defence was insanity. The defendant’s counsel in opening the case for the defendant proposed to read to the jury definitions of insanity from works of established reputation on the subject, and contended that books written by lawyers were admissible, even-if the court should hold that treatises of medical writers were not. And he referred for instances in which such works had been permitted to be read to the jury, to Rogers’s Trial and Townsend’s State Trials. Shaw, C. J., in giving the opinion of the court said: “ Facts or opinions on the subject of insanity, as on any other subject, cannot be laid before the jury except by the testimony under oath of persons skilled in such matter's. Whether stated in the language of the court or of the counsel in a former case, or cited from the works of legal or medical writers, they are still statements of fact, and must be proved on oath. The opinion of a lawyer on such a question of fact is entitled to no more weight than that of any other person not an expert. The principles governing the admissibility of such evidence have been fully considered by this court since the trial of Rogers; and the more recent English authorities are against the admission of such evidence.” Citing Collier v. Simpson, 5 Car. & P., 74; Cocks v. Purday, 2 Car. & Kirw., 270; 1 Greenl. Ev., § 440, note.
In Asworth v. Kittredge, 12 Cush., 193, the same learned judge, in giving the opinion of the court, used the following-language, which is pertinent to the case at bar:—“ It was not competent for the counsel for the plaintiff, against the objection of the other side, to read medical books to the jury. It was formerly practiced rather by general indulgence and tacit consent of the parties than in pursuance of any rule of law; *342but it has been frequently decided that it is not admissible, and we now consider the law to this effect well settled, both upon principle and authority. Where books are thus offered they are in effect used as evidence, and the substantial objection is that they are statements wanting the sanction of an oath; and the statement thus proposed is made by one not present, and not liable to cross-examination. If the same author were cross-examined, and called to state the grounds of his opinion, he might himself alter or modify it, and it would be tested by a comparison with the opinions of others. Medical authors, like writers in other departments of science, have their various and conflicting theories, and often sustain and defend them with ingenuity. But as the whole range of medical literature is not open to persons of common experience, a passage may be found in one book favorable to a particular opinion, when perhaps the same opinion may have been vigorously contested, and perhaps triumphantly overthrown, by other medical authors, but authors whose works would not be likely to be known to counsel or client, or to court or jury. * * If it be said that no books should be read except works of good and established authority, the difficulty at once arises as to the question what constitutes good • authority; more especially whether it is a question of competency to be decided by the court, whether any particular book shall be received or rejected, or a question of weight of testimony, so that any book may be read, leaving its weight, force and effect to the jury. Either of the alternatives would be ' attended with obvious, if not insuperable objections.”
The case of Washburn v. Cuddihy, 8 Gray, 430, is equally pertinent.
The recent case of Commonwealth v. Sturtivant, 117 Mass., 122, shows how firmly the Massachusetts courts adhere to the principle. It was an indictment for murder, in which it became important for the prosecution to show that certain blood stains were from human blood. In reply a witness called by the defence, an expert on the subject of blood stains, having said that in his opinion it was impossible to determine with certainty, in the case of a stain that had been *343dried upon clothing seven days, whether it was human blood, was asked if he coincided with the views of Dr. Taylor, as expressed in Taylor’s Medical Jurisprudence, which book was passed to the witness. The counsel then proposed that a certain paragraph upon that point from the book, with which the witness concurred in opinion, should be read to the jury by the witness, but the court excluded it, and the Supreme Court approved of this ruling as in accordance with a well settled rule.
In Collier v. Simpson, 5 Car. & P., 73, it is held that medical books are not admissible' evidence; but that medical men may give their opinions as witnesses, which opinions may in a measure be founded on the contents of standard medical books as a part of their general knowledge. This principle was quoted with approval in Carter v. The State, 2 Carter’s Ind. R., 617.
Standard treatises on evidence and other branches of the law maintain the doctrine we are contending for. In 1 Greenl. Ev., (12th ed.,) § 440 a, it is said that “particular facts relevant to the cause cannot be proved by reading from a published book, nor can medical books be cited by counsel.” See also 2 Taylor’s Ev., § 1279; 2 Graham & Waterman on New Trials, 686, 7.
In Luning v. The State, 1 Chandler’s R., 178, (Wisconsin,) it was held no error in the court below to refuse permission to counsel to read medical books, as it was a matter within the control and discretion of the court. It was also held in Wade v. De Witt, 20 Texas, 398, to be “ better for the administration of justice and the protection of the rights of parties that this matter be regulated by judicial discretion, rather than left to the unlimited discretion of counsel governed by the powerful motives of interest and ambition.”
The other ground for a new trial is, that the court restricted the reading of the case of State v. Andersen, 43 Conn., 514, to matters of law therein stated, excluding the facts of that case. And the record shows that the counsel did read freely from the opinion, omitting merely the facts.
Ordinarily the argument that the law of a case cannot be well understood without the facts would be unanswerable. *344But the case cited was peculiar. It was a petition for a new trial for newly discovered evidence, and as such in great measure addressed to the discretion of the court. And, properly speaking, there were no propositions of law growing out of and limited by the facts of the case. The petition of course presented fully the evidence as previously given on the trial, together with that claimed as newly' discovered; but there is nowhere a conclusion of law that the verdict first given on the evidence was wrong, or that the new evidence would, in law, change the result. Carpenter, J., in giving the opinion, on page 523 says:—“ It is not our province to revise the action of the jury. As we have already seen, we have no power to do that in this proceeding. Nor are we required to weigh the evidence, except so far as may be necessary to see whether, with the additional evidence that can now he presented, another jury would be likely to render a different verdict.”
In the discussion of that case the court gives the names of many witnesses, with a detailed statement of their opinions that Andersen was insane, and the reasons stated by them for such opinions. The jury in the present case surely had no right to hear that testimony, and no business whatever with the reasons given by those witnesses why they thought Andersen insane, even though the reasons as given would seem to apply equally to Hoyt. I cannot well conceive anything that could be offered to a jury more irrelevant, misleading and mischievous. It does not help the matter at all to suggest that the judges in that case must have concluded that the evidence x-eferred to might, if submitted to another jury, change the result.' The jury in the present case had xxo right to be iixfluenced by such a conclusion, nor had they a right to compare the weight of evidence in that case with the evidence iix this case. So far as the court defined and illustrated the various species of insanity and recognized moral insanity as a defence, the defendant had the full benefit of the case referred to, and this was all he was entitled to.
I think a new trial should not he granted.
In this opinion Park, O. J., concurred.