“It occurred to me that as Messrs. Norblad, Champneys, and myself had distinctly seen among the contents of the stomach some undigested apples, that the seeds or pips of the apple might give rise to the formation of prussic acid by distillation. I therefore determined on making an experiment to see if any and what quantity of prussic acid they were capable of producing. Accordingly the seeds from fifteen apples were bruised and put into a retort with some distilled water, and about an ounce of liquor was distilled off. On the application of the tests before spoken of, Prussian blue, in exceeding small quantity, was produced. On testing the last product of distillation, no Prussian blue was found. I have the whole of the Prussian blue thus produced. “About ten days ago I was applied to and requested to make more experiments for the purpose (if possible) of discovering the whole amount of prussic acid originally contained in the contents of the stomach, or at least of that portion brought to me. I stated that I had not the means in my possession of doing so, and that Mr. Norblad or Mr. Champneys possessed almost everything relating to the matter; but I thought it possible, if I had the remainder of the contents of the stomach, and that if it were contained in the same bottle in which it was originally brought, I might be able to do so—having a distinct recollection of about the height at which the matter stood in the neck of the bottle. Mr. Champneys, on Saturday, the 8th of February, delivered, with other matters, into my charge, the remainder of the contents of the stomach which had not before been subjected to any operation or experiment, and which, when I gave it him back, after my former experiments, I requested him to keep in a cool dark place for further investigation, should it be deemed requisite. The bottle was tightly corked and securely tied over with a piece of bladder. Before uncorking it, I made a mark with a file outside the bottle coincident with the surface of the contents in the interior. I then emptied the contents into a glass alembic, washed the bottle out with a little distilled water, and added this to the matter in the alembic. The head of the alembic was then put on, a condensing apparatus attached, the alembic placed as before on a salt-water bath, the bath brought to the boiling point, and distillation conducted until the whole of the prussic acid was expelled. A solution of nitrate of silver was put into the recipient for the purpose of seizing hold of the hydrocyanic acid the moment it reached that vessel. By this process I succeeded in obtaining 1·455 grains of dry cyanide of silver, very slightly contaminated with chloride of silver. The latter did not amount to a quantity which could be collected and weighed. But if I allow 0·025 grains, and call the quantity of cyanide of silver produced in reality 1·43 on the quantity operated on in this instance, it must be