NO. 1451. 



BRAINS AND BRAIN PRESER VA TIVES-HRDLICKA. 291 



K)3 and 9< grams), 98.54 and 100.51 per cent of their original weight 

 (Ihere IS no relation apparent at this stage between the changes and 

 weight ot the specimens, but ultimately the originally heaviest brain 

 showed with one exception only, the least loss, the lightest brain the 

 grea es loss. The specimen in the 6 c. c. to the gram solution (original 

 weight 122 gi-ams) lost 2.05 per cent, with two slight exceptions, more 

 than any of the above; that weighed daily (original weight 108 grams) 

 losmgl.l< percent, or more than any other specimen in the whole 



series 



End of iirst month: The weight of the specimens in 3 c. c to the 

 gram solution had diminished from 1.15 to 11.27 per cent (the heaviest 

 brain losing least, ih^ lightest most). Variation: From 89 17 to 96 25 



fr" '"'Ir?" ^''' '""*• ^^" '*^^"^^^« ^^^'^ ««<^ harmonious with 

 those ot the first week nor proportionate to the original weight of the 

 brains. The specimen in the 6 c. c. to the gram solution lost 5.44 per 

 cent more than the majority of the above, that weighed daily 11 11 

 per cent more than any but one in the whole series 



Chang-es in the brain weighed every day: A slight increase in 

 weight the first twenty-four hours, followed by gradual, steady 

 decrease, apparently not affected by either of the changes of solution. 



ONE-FIFTH SATURATED SOLUTION OF ALUM WITH 5 PER CENT 



FORMALIN. 



End of first week: Weight of one of the nine brains in the 3 c. c to 

 the gram solution had very slightly decreased, of one it was the same as 



original, and It had slightly increased (0. 43 to 3. 12 per cent) with the seven 

 remaining. Vanation: From 99.09 (original weight 109.5 grams) to 

 103.12 per cent (original weight 96 grams) =4.03 per cent. The two 

 heaviest bi^ms (116 and 115 grams) had gained in weight, respectively, 

 0.43 and 0.8v per cent, the two lightest (99 and 96 grams) 3.03 and 3 12 

 per cent. The brain in the 6 c. c. to the gram solution (original weight 

 126 grams) had lost 1.59 per cent, or more than any of the above, while 

 1 that weighed daily (original weight 100.2 grams) gained 1.99 pe; cent. 

 ^ l.nd of first month: All of the nine brains of the first group had lost 

 I in weight (7.35 to 12.83 per cent). Variation: From 87.56 to 95 45 

 I per cent =7.89 per cent. The changes, while not differing greatly 

 , were not harmonious with those of the first week nor proportionate 

 ^ to the weight of the specimens. The brain in the 6 c. c. to the gram 

 ' solution lost in weight 7.66 per cent, that weighed dailv 9.76 per cent 

 or more than any other in the whole series. 



Changes in the brain weighed daily: A moderate increase, reaching 

 maximum on the third day, and then a slow continuous loss, not 

 aflected by the changes of solution. 



