CHAI'. XVII. ABSORPTION BY THE GLANDS. 419 



brown tint. When looked at again after 1 hr. 30 m., most of 

 them presented a somewhat different appearance. A third 

 specimen was treated with a weaker solution of one part of the 

 carbonate to 437 of water, and after 1 hr. the glands were pale 

 brown and contained numerous granules. 



Four summits were irrigated with a solution of one part of 

 nitrate of ammonia to 437 of water. One was examined after 

 15 m., and the glands seemed affected ; after 1 hr. 10 m. there 

 was a greater change, and the primordial utricles in most of 

 them were somewhat shrunk, and included many granules. 

 In the second specimen, the primordial utricles were consider- 

 ably shrunk and brownish after 2 hrs. Similar effects were 

 observed in the two other specimens, but these were not ex- 

 amined until 21 hrs. had elapsed. The nuclei of many of 

 the glands apparently had increased in size. Five bladders 

 on a branch, which had been kept for a long time in mode- 

 rately pure water, were cut off and examined, and their glands 

 found very little modified. The remainder of this branch was 

 placed in the solution of the nitrate, and after 21 hrs. two blad- 

 ders were examined, and all their glands were brownish, with 

 their primordial utricles somewhat shrunk and finely granular. 



The summit of another bladder, the glands of which were in a 

 beautifully clear condition, was irrigated with a few drops of 

 a mixed solution of nitrate and phosphate of ammonia, each 

 of one part to 437 of water. After 2 hrs. some few of the 

 glands were brownish. After 8 hrs. almost all the oblong glands 

 were brown and much more opaque than they were before ; 

 their primordial utricles were somewhat shrunk and contained a 

 little aggregated granular matter. The spherical glands were 

 still white, but their utricles were broken up into three or 

 four small hyaline spheres, with an irregularly contracted mass 

 in the middle of the basal part. These smaller spheres changed 

 their forms in the course of a few hours, and some of them 

 disappeared. By the next morning, after 23 hrs. 30 m., they 

 had all disappeared, and the glands were brown ; their utricles 

 now formed a globular shrunken mass in the middle. The 

 utricles of the oblong glands had shrunk very little, but 

 their contents were somewhat aggregated. Lastly, the summit 

 of a bladder which had been previously irrigated for 21 hrs. 

 with a solution of one part of sugar to 218 of water without 

 being affected, was treated with the above mixed solution ; and 

 after 8 hrs. 30 m. all the glands became brown, with their 

 primordial utricles slightly shrunk. 



Four summits were irrigated with a putrid infusion of raw 



