294 PROCEEDINGS OF THE NATIONAL MUSEUM. 



ONE-THIRD SATURATED SOLUTION OF ALUM WITH SODIUM CHLORIDE 

 TO 1,030 SPECIFIC GRAVITY, AND 10 PER CENT FORMALIN. 



End of tirst week: The brains in the group of nine in the 3 c.c. to 

 the gram solution all lost moderateh' in weight ( — 2.99 to —9.74 per 

 cent). Variation: From 90.20 (original weight 113 grams) to 97.01 

 per cent (original weight 100.5 grams) =6.75 per cent. The two 

 heaviest brains (115.2 and 113 grams) lost in weight, respectivelj-, 7.99 

 and 9.74 per cent, the two lightest (100.5 and 95.5 grams) 2.99 and 

 5.24 per cent. Ultimately, however, the heaviest brain shows the 

 least loss, while that of the lightest specimen is among the greatest 

 losses. The specimen in the 6 c. c. to the gram solution (original 

 weight 115.5 grams) lost G.OG per cent; that weighed daily, however 

 (original weight 105 grams), 10.95 per cent, or more than an}^ other 

 in the series. 



End of the tirst month: The brains in the 3 c. c. to the gram solution 

 all show a further marked loss of weight (—6.6 to —13.81 per cent); 

 tlie heaviest ))rain had lost the least, the lightest the most. Variation: 

 From 78.70 to 85.94 per cent =7.24 per cent. Changes were not har- 

 monious with those of the first week, and were more in a reverse than 

 a direct proportion to the original weight of the specimens. The 

 l)rain in the 6 c. c. to the gram solution lost 11.52 per cent, that weighed 

 daily 11.76 per cent. 



Changes in the brain weighed daily: A moderate loss the lirst and 

 second day and gradual loss, unatiected by the changes of solution, 

 thence onward. 



ONE-THIRD SATURATED SOLUTION OF ALUM WITH SODIUM CHLORIDE 

 TO 1,080 SPECIFIC GRAVITY, AND 5 PER CENT FORMALIN. 



End of first week: Weight of brains in the 3 c. c. to the gram solu- 

 tion had risen slightly (+0.44 to +4.08 per cent). Variation: From 

 100.44 (original weight 114 grams) to 104.08 per cent (original weight 

 98 grams) =3.64 per cent. The two heaviest brains (123 and 114 

 grams) had gained, respectively, 4.06 and 0.44 per cent, the two lightest 

 (98 and 97.5 grams) 4.08 and 3.58 per cent. The brain in the 6 c. c. to 

 the gram solution lost 1.66 per cent, that weighed daily 4.63 per cent. 



End of tirst month: Weight of all brains had notably diminished 

 ( — 13.67 to —21.12 per cent in the group of nine). Variation: From 

 81.72 to 89.84 per cent =8.12 per cent. The changes were not pro- 

 portionate to the weight of the specimens. The biain in the 6 c. c. to 

 the gram solution lost in weight 10.13 per cent, less than any of the 

 above, and that weighed daily 9.22 per cent, or still less than the pre- 

 ceding, which compensated with both specimens for the loss during 

 the first week. 



Changes in the brain weighed daily: A slow loss from the first day 

 onward, aecelerated slightly the day after each change of solution. 



