114 



DR DAVY'S OBSERVATIONS ON THE CUTICLE 



March 30. No, 



, 1 had lost 



81 



grs., 



or 6-6 



per cent. 





>> n o 



2 



5) 



56-0 



jj 



36-6 



)> 





5) 31. ,, 



1 



» 



181 



j) 



140 



>> 





)> » J) 



2 



» 



107-0 



>) 



67-2 



>> 



It is shrunk and rigid. 



April 3. „ 



1 



>> 



360 



?) 



28-1 



i) 





>» )> >> 



2 



)» 



114-3 



»> 



71-7 



15 



It sustained no further loss. 



)> 9. ,, 



1 



)> 



61-0 



>; 



47-4 



)) 



Its softness and suppleness diminishing. 



„ 12. „ 



1 



)) 



71-6 



5) 



55-6 



)) 



Is now rigid. 



7. The Barn-door Fowl (Gallus domesticus). As soon as killed, the wattles of a 

 cock two years old were cut off, a ligature having been previously applied at the 

 base of each. One (No. 1), from which the cuticle was scraped off, weighed 62*2 

 grs. ; the other (No. 2), on which the cuticle was left, weighed 79 5 grs. 



October 21. No. 1 has lost 25*3 grs., or 40 6 per cent. 



?) 



>j 



2 



22. 



)> 



1 



5) 



»> 



2 



24. 



5> 



1 



>> 



>) 



2 



27. 



5> 



1 



)> 



>' 



2 



30. 



)) 



1 

 2 



14-8 



, 186 



356 



., 57 2 



26-4 



33-2 



41-7 , 



„ 67-0 



42-5 , 



, 53-4 



447 , 



, 71-8 



52-8 



66-4 



45-2 , 



, 72-3 



55-6 „ 



700 



It is hard and rigid. 



{Excepting margin, still retains some 

 flexibility. 



Is quite rigid. 



8. The trial was repeated on the legs of a fowl on the 18th May, when the 

 temperature of the room was 65~, without a fire. They were separated at both 

 their j unctions, viz., femur and tarsus. One (No. 1), stripped of its integuments, 

 weighed 835 5 grs. ; the other (No. 2) its integuments on, the skin drawn over 

 each stump and secured by a ligature, weighed 889 grs. This without the 

 feathers, which had been removed. 



May 19. I! 



fo. 1 has 



lost 115-5 



grs-, 



or 13-8 



>> >) 



„ 2 



8-5 





„ 



■9 



„ 20. 



„ 1 



201-5 





), 



24-0 



J) J? 



„ 2 



145 





>> 



16 



„ 21. 



i— i 



2660 





)> 



31-8 



5) )> 



„ 2 , 



20-0 





7> 



2-2 



„ 22. , 



, 1 , 



3200 





!, 



38-3 



■>j >? "> 



, 2 , 



25-5 





?> 



2-8 



rune 5. , 



, 1 , 



81-5 





JJ 



100 



)t )? ? 



, 2 



487-0 





3; 



58-0 



„ 17. , 



, 2 , 



522- 





j) 



62-4 



, Is free from any unpleasant smell. 



, Is becoming putrid. 



i Not again weighed, owing to its putrid state. 



No further loss. 



Comparing the results of the one covered with integument with those of the 

 other deprived of it, apart from the vastly greater loss of water by evaporation, 

 the other changes were strikingly contrasted. No. 1, that deprived of integu- 

 ment, excepting its loss of water and its hard, rigid state in consequence, seemed 

 little altered ; when moistened it was quite free from any putrid taint, and its 

 muscles exhibited their striated structure with undiminished distinctness. No. 2, 

 on the contrary, that on which the integument was left — that still retaining its 



