142 KfFECTS 0$ HEAT ON ANIMALS. 



Receipt for making the Cement. 

 The cement. Boil two quarts of tar with two ounces Of kitchen 

 grease, for a quarter of an hour, in an iron pot. Add 

 Some of this tar to a mixture of slaked lime, and powdered 

 glass, which have passed through a flour sieve, and been 

 dried completely over the fire in an iron pot, in the pro- 

 portion of two parts of lime, and one of glass, till the mix- 

 ture becomes of the consistence of thin plaster. 



The cement must be used immediately after being mixed, 

 and therefore it is proper not to mix more of it at a time 

 than will coat one square foot of wall, since it quickly be- 

 comes too hard for use, and continues to increase its hard- 

 ness for three weeks. Great care must also be taken to 

 prevent any moisture from mixing with the cement. 



For a wall which is merely damp, it will be sufficient to 

 lay on one coating of the cement, about one eighth of an 

 inch thick ; but should the wall be more than damp, or wet, 

 it will be necessary to coat it a second time. 



Plaster made of lime, hair, 

 afterwards laid on the cement. 



Mrs. Ann Kemmish, King Street, Borough ; Mr. Boone, 

 Gregory Place; and Mr. Thomas Cannadine, Hook's Gar- 

 dens, Tooley Street, have certified that Mr. Wilson's ce- 

 ment has been used with effect, on damp walls belonging to 

 them. 



VII. 



Experiments on the Effects produced by a High Tempera- 

 ture on the Animal Economy. By F. F. Dklaroche, of 

 Geneva.* 



Living brings xIlMONG the numerous characters that distinguish organ- 

 ise a peculiar j zec i }j 0( jj es an( j particularly those of animals, from in an- 

 • power of resist- J 



ing cold, imate substances, one of the most remarkable beyond ques- 



tion is the faculty they have of resisting cold, and preserv- 

 ing in general a temperature superior to that of the medium 

 in which they are placed. Accordingly this property of 



* Journal de Physique, Vol. LXIII. p. 207. Sept. 1806. 



living 



