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Show 420 UTRICULARIA NEGLECTA. CHAP. XVII. meat. No change in the ~lands was observable for some hours, but after 24 hrs. most of them had become brownish, and more opaque and granular than they were before. In these specimens, as in those irrigated with the salts of ammonia, the nuclei seemed to have increased both in size and solidity, but they were not measured. Five summits were also irrigated with a fresh infusion of raw meat; three of these were not at all affected in 24 hrs., but the glands of the other two had perhaps become more granular. One of the specimens which was not affected was then irrigated with the mixed solution of' the nitrate and phosphate of ammonia, and after only 25 m. the glands contained from four or five to a dozen granules. After six additional hours their primordial utriclcs were greatly shrunk. The summit of a bladder was examined, and all the glands found colourless, with their primordial utricles not at all ~hrunk; yet many of the oblong glands contained granules just resolvable with No. 8 of Hartnack. It was then inigated with a few drops of a solution of one part of urea to 218 of water. After 2 hrs. 25 m. the spherical glands were still colourless; whilst the oblong and two-armed ones were of a brownish tint, and their primordial utricles much shrunk, some containing distinctly visible granules. After 9 hrs. some of the spherical glands were brownish, and the oblong glands were still more changed, but they contained fewer separate granules; their nuclei, on the other hand, . appeared larger, as if they had absorbed the granules. After , 23 hrs. all the glands were brown, their primordial utricles greatly shrunk, and in many cases ruptured. . . A bladder was now experimented on, which was already somewhat affected by the surrounding water; for the spherical glands, though colourless, had their primordial utricles slightly shrunk; and the oblong glands were brownish, with their utricles much, but irregularly, shrunk. The summit was treated with the solution of urea, but was little affected by it in U hrs.; nevertheless, after 23 hrs. the .spherical glands were brown, with their utricles more shrunk; several of the other glands were still browner, with their utricles contracted into irregular little masses. Two other summits, with their glands colourless and their utricles not shrunk, were treated with the same solution of v.rea. After 5 hrs. many of the glands presented a shade of brown, with their utricles slightly shrunk. After 20 hrs. 4..0 m. some few of them were quite brown, and contained CHAP. XVII. SUMMARY ON ABSORP'l'ION. 421 irregularly aggregated masses . oth . h · . ' ' crs were still colo 1 . t ough their utrwles were shrunk. b L th ur ess, were not much affected . ThI' s wa's aU lJg oode m?rseta ter nuf mhb er unequally the glands on the same bl dd ance o . ow .cc t d l'k . a or are sometimes auoc e ' as I ewiSe often occurs with l · t . . . t T th P an s growm 0' 1n foul wa er. wo o er summits were treated with a ~ . had been kept durinb()' several days I·n a warm roosmol utawnnd wthl ic·h . glands were not ~tall affected when examined after 21 hrs leu t ·A d weak·e r solutiO· n of one part of urea to 437 of wa t er wa.s next r rie on SIX summits,al! carefully examined before beingirria t J l rhe first was re-exammed after 8 hrs 30 m d th ba ec . including t.he sph?rical. ones, were br~wn; ~~a~~ of t~e ~~l~~s, glan~s having their pnmordial utricles much shrunk d . g cludmg granules. The second summit befor b · · a? mhad been somewhat affected by the su;.round~na ewinagt·eJr~gattehd, l · 1 1 d . b r, 10r e fs p 1enf cah g an s were not quite uniform I·n appearance· and a ew o t c oblong ones were brown, with their utricles ~hrunk Of the obion? glands, those which were before colourless b ~ c~me brown In 3 hrs. 12m. after irrigation with their t '. 1 e slightly shrunk. 1,he spherical glands di·a' not b ubnc es b t th · ecome rown u eir. contents seemed changed in appearance, and afte~ 23 hrs. still more changed and granular. Most of the obion glands were nowr dark brown, but their utricles were no1 greatly shrunk. rhe four other specimens were examined after 3 hrs: . 30 rn. ~ after 4 hrs., and 9 hrs. ; a brief account of their conditiOn wlll be sufficient. The spherical glands were not brown, but some of them were finely granular. lVIany of the o~long gl~nds were brown ; and these, as well as others which still remained colourless, had their utricles more or less shrunk some of them including small aggregated masses of matter. ' Summary of the Observat~'ons on Absorph'on.-From the. facts now given there can be no doubt that the vanously shaped glands on the valve and round the colla~· have the power of absorbing matter from weak solutions of certain salts of ammonia and urea and fro~ a putrid infusion of raw meat. Prof. Cohn believes that they secrete slimy matter ; but I was not .able to perceive any trace of such action, excepti~ g that, after i~mersion in alcohol, extremely fine hnes could son1etunes be seen radiating from their |