VOL. XXVII.] PHILOSOPHICAL TRANSACTIONS. QgQ 



but continued well for the 3 days after, that we kept him.— January 4th, a 

 drachm and half of spirit of salt, diluted in an ounce and half of water, and 

 injected into the jugular vein of a dog, killed him immediately. In the right 

 ventricle of his heart we found the blood partly grumous and concreted into 

 harder clots than ordinary, and partly frothy. In the same dog that gland that 

 contains worms, and is frequently found in the oesophagus, opened with two 

 orifices into the cavity of that part, and in the sinuses of it there lay several 

 small worms. 



January the 5 th, we gave a dog 12 small caterpillars of the pine-tree, or 

 pityocampae, vel erucae pini, weighing half a drachm, which we bruised alive, 

 and mixed with flesh. The dog, though he was but young, received no other 

 hurt, than that now and then he seemed as if he endeavoured to swallow some- 

 thing, or was troubled with an inclination to vomit, from whence we judged 

 the stomach and oesophagus to be only lightly affected ; but these symptoms 

 vanished in a few hours, and the dog continued brisk, and greedy of meat, all 

 the rest of the day. — The same day we included a rat in a large glass with a 

 scorpion, but the scorpion, being dull and benumbed with the extreme cold- 

 ness of the weather, was able to wound the rat but very weakly; with which 

 however the rat being provoked, set upon the scorpion, and gnawed off and 

 devoured part of him, keeping his eyes shut all the while, that he might not 

 be hurt by his claws or sting. The same hie happened to another scorpion, 

 which we added to the former; but the rat notwithstanding remained unhurt. 

 January the 6th, we killed a dog almost in a moment, by injecting into his 

 jugular vein an ounce of spirit of wine, in which there was dissolved a drachm 

 of camphire. — ^I'he same day we injected warm into the crural vein of a cat, 50 

 grains of opium, dissolved in an ounce of water. The cat, presently after the 

 injection, seemed very much dejected, but did not cry; only made a low, inter- 

 rupted, complaining noise. After this followed tremblings of her limbs, con- 

 vulsive motions of her eyes, ears, lips, and almost of all parts of her body, 

 with violent convulsions of her breast; sometimes she would raise up her head, 

 and seem to look about her, but her eyes were very dull and deadish; and 

 though she was let loose, and had nothing tied about her head or neck, yet her 

 mouth was so filled with foam or froth, that she was like to be strangled. At 

 last, her convulsive motions continuing, and being seized with a stretching of 

 her limbs, she died within a quarter of an hour. On opening her body, we did 

 not find the blood much altered from its natural state. 



February the 7th, we injected into the crural vein of a lusty strong dog, a 

 drachm and half of opium, dissolved in an ounce and half of water. The dog 

 immediately showed the great pain he endured, by a violent struggling of his 

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