Compounds of Albumin and Myosin. 317 
Our preparations were made by adding urany! nitrate to the pre- 
pared albumin solution and washing the precipitated albuminate 
until all excess of uranium was removed. The uranium in the dried 
preparation was determined as uranoso-uranic oxide (U,O,) by simple 
ignition. The results show a fairly close agreement, but they are 
undoubtedly somewhat too high, owing to a small amount of 
adherent ash. 
With UO,(NO,),. 
No. Amt. sub. taken. Wt. U3Oz. Per cent. U;Os. Per cent. U. 
la 0-5980 gram. 0:0324 gram. 5°41 4-59 
b 0:51938 00281 5°41 4°59 
2a 08219 00428 5°20 4°41 
b 0:8081 0:0418 5:17 4°38 
3a 04392 00251 5°71 4°84 
0:5330 0:03803 5°68 4°81 
4a 0°8183 0:0427 5:22 4°43 
b 0:7576 0:0394 5:20 4°41 
x 06985 0:0367 5:25 4°46 
6a 04269 0:0247 5°78 4:90 
b 0:5496 0:03138 5:70 4°83 
These results plainly do not accord at all with Kowalewsky’s. On 
the other hand they do agree fairly well with each other, and would 
seem to indicate a reasonably constant composition of the uranyl- 
albumin precipitate. 
The average of the results obtained, accords most closely with the 
formula 
(Cy2Hi12NisSOn2)s +U—H, 
which requires 4°73 per cent. U. 
(f) Mercury compounds. 
By the addition of an excess of mercuric chloride solution to 
an aqueous solution of egg-albumin, an albuminate of mercury is 
formed, insoluble in excess of the mercury salt. The compound can 
be easily filtered and admits of thorough washing with water. Rose 
first proved that the precipitate formed as above, is a compound of 
mercury with albumin, instead of a compound of the mercury salt 
with albumin as supposed by Bostock and Orfila. 
We have made a few preparations of the albuminate by adding a 
moderately strong aqueous solution of mercuric chloride to portions 
of the dialyzed albumin solution and washing the precipitates 
thoroughly with water. The mercury in the albuminate was deter- 
