288 PROVE EDIXfrS OF THE NATIONAL MUSEUM. 



(original weij^ht, 123 grams) lost 2.39 per cent in weight, more than 

 either of the above; while that weighed daily (original weight, 114 

 grams) lost even more, or exactly 3.03 per cent. 



The brain weighed daily fell very slightly in weight during the tirst 

 day, rose slightly during the next two days (reaching maximum the 

 third day), remained stationary the fourth day and then began to lose. 

 It rose the first dr.}' after a change of solution, remained one day sta- 

 tionary, and then lost slightly, gained again a little, and then con- 

 tinued to lose to the end of the tirst month. No rise followed the one 

 month change, the specimen remaining stationary in weight for one 

 day, and then went on losing. 



SATURATED SOLUTION OF ALUM WITH 5 PER CENT FORMALIN. 



End of tirst week: Weight of brains in 3 c. c. to the gram solution had 

 fallen in average nearly 23 per cent, or nearly one-fourth of the original. 

 Variation: From 74.27 (original weight 103 grams) to 81.74 percent 

 (original weight 115 grams) =7.47 per cent. The two heaviest brains 

 (115 and 109.7 grams) lost, respectively, 18.26 and 23.25 per cent in 

 weight, the two lightest ones (92 and 88 grams) 21.74 and 23.87 per 

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

 125.2 grams), the largest specimen in the series, lost but 17.74 per 

 cent, hence less than any other; that weighed ever}' day (original 

 weight 101 grams) lost 25.75 per cent, which is more than any of the 

 remaining nine in same solution. 



End of one month: All of the ))rains in the 3 c. c. to the gram 

 liquid had suffered noticeably further loss, and that from 4.86 to 9.04 

 per cent. Variation: From 61.08 to 74.45 per cent =10.37 per cent. 

 The changes were not harmonious with those of the first week nor 

 proportionate to the weight of the specioiens. The brain in the 6 c. c. 

 to the gram solution, though large, lost considerable (10.68 per cent); 

 and that weighed every day became relatively lightest but one of all 

 those in the 3 c. c. to the gram solution. 



The brain weighed every day showed a great loss during the first 

 twenty-four hours, lost slowly and steadily for eighteen days, remained 

 nearly stjitionary during next thirty days, and then lost slightly again. 

 The (lay after each change of solution an insignificant rise took place. 



ONE-THIRD SATURATED SOLUTION OF ALUM WITH 5 PER CENT 



FORMALIN. 



End of Hrst week: Four of the nine brains in the 3 c. c. to the gram 

 solution showed a very slight increase (+0.42 to +0.90 per cent), five 

 a slight decrease ( — 1.43 to —2.59 per cent). Variation: From 97.41 

 (original weight 116 grams) to 100.9 per cent (original weight 110 

 grams) =3.49 per cent. The two heaviest brains (120 and 116.5 grams) 

 showed, respectively, 100.42 and 97.85 per cent; the two lightest ones 



