■^O^ INov. 15, 



Genootschap, Leeuwarden, Netherlands (147) ; Observatoire 

 Physique Central (147), Prof. S. Nikitin (143, 146, 147), St. 

 Petersburg, Russia; K. Vetenskaps Akademiens, Stockholm, 

 Sweden (143, 146); Dr. Japetus Steenstrup, Copenhagen, 

 Denmark (147); Gesellschaft fiir Erdkunde, Berlin, Prussia 

 (L47); Osservatorio di Torino, Torino, Italia (143, 146); Mr. 

 C. Juhlin Dannfeld, London, Eng. (147) ; Geological Society, 

 Glasgow, Scotland (143); Bowdoin College, Brunswick, Me. 

 (147); American Mathematical Society, New York, N. Y. 

 (147). 



Accessions to the Library were reported from the Royal 

 Observatory, Cape of Good Hope, Africa ; R. Geographical 

 Society (Queensland Branch), Brisbane, Australia ; Royal 

 Society N. S. Wales, Sydney, Australia; K. K. Militar-Geo- 

 graphische Institut, Vienna, Austria; K. P. Meteorologische 

 Institut, Berlin, Prussia ; K. Sachsische Meteorologische 

 Institut, Chemnitz, Saxony; Vereiu fiir Erdkunde, Dresden, 

 Saxony ; Senckenbergische Naturforschende Gesellschaft, 

 Frankfurt-am-Main, Germany ; Verein fiir Erdkunde, Metz, 

 Germany ; Mr. Andrew McFarland Davis, Cambridge, Mass. ; 

 Scientific Association, Meriden, Conn. ; American Museum 

 Natural History, Prof. W. LeConte Stevens, Mr. Francis P. 

 Harper, New York, N. Y. ; Academy of Science, Rochester, 

 N. Y. ; Memorial Committee, Dr. D. G. Brinton, Messrs. W. H. 

 Seelay, Jules Viennot, Philadelphia, Pa. ; Field Columbian 

 Museum, Chicago, 111. 



Deposited, by Dr. J. C. Morris, a Tilghman microscope, can- 

 dlestick pattern, made by Samuel Powel and Dr. Morris, at 

 Newport, R. L, August, 1864. 



The following description was given : 



" The stand supports a cradle in which the compound body 

 slides and rests, being supported by a clip in which plays a 

 screw with ten threads to one inch. This affords a coarse and 

 medium adjustment; it rests movably also on a lever hinged 

 to the upper part of the cradle, so that the point of the screw 

 being placed at a given distance — say one-tenth — from the 

 fulcrum or joint, the raising of the extremity of the lever — say 



