26 JOURNAL OF THE [January^ 



one minute, after having inserted a test tube containing urine, 

 and then exhibiting the deposit in the bottom of the test tube. 



Mr. J. D. Hyatt remarked on his exhibits that the material 

 belonged to the silurian age, and was formed in shallow 

 seas by the grinding of calcareous matter, acquiring the 

 oolitic form from the concretions of varying colors depositing 

 around a nucleus, and being rolled upon beaches ; that in ex- 

 hibit No. 3 the nuclei are usually minute grains of sand, with 

 the spheres of generally uniform size, and the structure be- 

 tween the spheres like chalcedony ; in exhibit No. 4 the nuclei 

 are minute particles of organic matter, with the crystallization 

 radiating from the nuclei, giving the appearance of hornstone ; 

 and that the specimen No. 5, from Pennsylvania, has its nuclei 

 of carbonaceous matter with remarkably uniform spheres. 



Mr. Bennett explained his exhibit as follows : The slide con- 

 tains two preparations, opaque and transparent, of the fungus 

 yEcidium adoxce. The opaque preparation shows the peridia in 

 various stages of growth, and the transparent preparation 

 shows a perpendicular section through a burst peridium. The 

 fungus is found in the spring and summer on the under side of 

 the leaf of Adoxa moschatellina — Hollow-root — a little, incon- 

 spicuous plant, 4 or 5 inches high, growing in woods and 

 moist, shady places in cooler regions. The pale, green flowers 

 have a musky smell, whence its common name, Moschatel. 



Dr. Skeel donated for distribution samples of wire helices, of 

 his own construction, for supporting cover-glass preparations. 



PUBLICATIONS RECEIVED. 



American Monthly Microscopical Journal: Vol. XIV., No. 10 — Vol. XV.,, 

 No. I (October, 1893 — January, 1894). 



The Microscope: Vol. I., No. 11 — Vol. II., No. i (November, 1S93 — Janu- 

 ary, 1894). 



The Observer: Vol. IV., No. 11 — Vol. V., No. i (November, 1893 — Janu- 

 ary, 1894). 



Bulletin of the Torrey Botanical Club: Vol. XX., No. 11— Vol. XXI., No. 

 I (November, 1893 — January, 1894). 



Natural Science Association of Staten Island: Proceedings (November 11,. 

 1893 — January 13, 1894). 



