654 I-HILOSOPHICAL TRANSACTIONS. [aNNO 1754. 



lime would in that state become more active in promoting putrefaction, than 

 when the trials were made in cold water. 



And indeed it must be owned, that when any experiments are made on medi- 

 cinal substances out of the body, the nearer we can make them to the heat of 

 the blood, and to other circumstances those substances must undergo in the first 

 passages, the more just the inferences will be, that are drawn from those ex- 

 periments. 



In regard to that quality of lime-water, in preserving fish longer sweet than 

 flesh. Dr. Pringle took notice, that he doubted it was a common mistake to ac- 

 count fish a more corruptible substance than the flesh of land animals. For 

 though fish might become sooner stale for eating than most flesh meats, yet 

 that fish did not so soon rise to a rank degree of putrefaction as flesh; and there- 

 fore that the former would be kept longer tolerably sweet than the latter by any 

 kind of antiseptic. 



CV. Medical and Chemical Observations on Antimony. By John Huxham, 



M. D., F. R. S. p. 832. 



In the present advanced state of pharmaceutical chemistry, it is deemed unne- 

 cessary to reprint this long paper on the different preparations of antimony. Dr. 

 H. particularly recommends his so called essence of antimony, or vinum anti- 

 moniale, prepared by infusing either the glass of antimony or regulus of anti- 

 mony in white wine. This he preferred to every other antimonial medicine. 



CFl. Of Mr. Samuel TiilVs Method of Castrating Fish. Communicated by W. 



Watson, F.R.S. p. 870. 



Several years since, Mr. TuU of Edmonton performed the operation of cas- 

 trating fishes, before Sir Hans Sloane, Bart, and several members of the Royal 

 Society, who met at Sir Hans house for that purpose. About 5 or 6 years ago 

 he performed the same operation in presence of our late president Mr. Folkes, 

 and others. 



In England, where in many parts sea-fish are in great plenty, the fish of 

 rivers and ponds are less esteemed ; and improvements, either with regard to 

 their bulk or increase, are less attended to; but in Germany, remote from the 

 sea, where pond-fish are a great article of traffic, Mr. Tull's method may be of 

 great use. 



Mr. Tull says that he castrates both the male and female fish; and that, 

 although almost any time is proper for the operation, the least so is just after they 

 have spawned, as the fish then are too weak and languid to bear, with success, 

 so severe an operation. The most eligible time however is when the ovaries of 

 the female have their ova in them, and when the vessels of the male, analogous 



