720 



SCIENCE. 



[N. S. Vol. IX. Ko. 229. 



same reagent, similar etch figures on tlie same 

 face — it is concluded that, if the law hold actin- 

 olite and all amphiboles without a sesquioxide, 

 ■cannot be isomorphous, with a hornblende ; (5) 

 the holohedral character of all amphiboles — it 

 is established for monoclinic and orthorombic 

 species ; (6) the demonstration of the orthorom- 

 bic character of anthophyllite and of gedrite, a 

 doubt of which has been expressed by Hiutze 

 and others ; (7) a comparison between the am- 

 phiboles and pyroxenes as to etching properties 

 — an extraordinary likeness in the figures pro- 

 duced on the pinacoids and on the artificial 

 face of actinolite representing in position the 

 plane (110) of diopside seems to ally the two 

 groups even more closely than has been sus- 

 pected ; (8) the proof that close attention must 

 be given to the method of etching with hydro- 

 fluoric acid." 



The discovery of anomalous etch-pits on a 

 hornblende from Philipstad, Sweden, led to the 

 recognition of a new variety of hornblende 

 characterized by a well-marked zonal structure, 

 an unusually small optical angle, an unusual 

 pleochroism and absorption scheme, and a pe- 

 culiar chemical composition. For details see 

 Proceedings of the American Academy of Arts 

 and Sciences, Vol. XXXIV., Nos. 15 and 16, 

 March, 1899. 



J. M. BOUTWELL, 



Recording Secretary. 



THE ACADEMY OP SCIENCE OF ST. LOUIS. 



At the meeting of the Academy of Science 

 of St. Louis of May 1, 1899, nineteen persons 

 present, the Secretary presented by title a paper 

 by Professor F. E. Nipher, on gravitation in 

 gaseous nebulis. 



Dr. Amand Ravold exhibited cultures and 

 microscopic specimens showing the Micrococcus 

 intercellularis meningitidis of Weichselbaum, ob- 

 tained from a case of cerebro-spinal meningitis, 

 and stated that this case afforded an interest- 

 ing instance of germ infection through the 

 placenta, inasmuch as the cerebro-spinal system 

 of an unborn child of the patient was likewise 

 found to be infected by the germ, from which 

 source, in fact, the specimens exhibited were 

 derived. 



Mr. H. von Schrenk presented the general re- 



.sults of a study of certain diseases of the yellow 

 pine, illustrating his remarks by the exhibition 

 of a number of specimens showing the charac- 

 teristic phenomena of the diseases and the 

 fruiting bodies of the fungi which cause them. 

 William Teelease, 

 General Secretary. 



university of COLORADO SCIENTIFIC SOCIETY. 



The following papers have been presented 

 dui'ing the year : ' Methods of determining the 

 Solar Parallax,' Dr. Frederick L. Chase, of Yale 

 University; ' A Theory of the Nature of Philos- 

 ophy, Dr. Francis Kennedy ; ' The Velocity of 

 Electrical Waves,' Dr. Wm. Duane ; 'Graphical 

 Methods of determining Stresses in framed 

 Structures,' Mr. Frederick T. Kubidge ; ' Wire- 

 less Telegraphy,' Dr. Wm. Duane. 



The Society meets the first Friday in each 

 month from November to March. All men of 

 science are invited to attend the meetings. 

 Francis Ramaley, 



Secretary. 



Boulder, Colo., April 28, 1899. 



DISCUSSION AND CORRESPONDENCE. 



THE STORAGE OF PAMPHLETS. 



Recent correspondence on this subject in the 

 pages of Science suggests that a description of 

 the method adopted in my private library, as 

 also in that of the Geological Department of the 

 British Museum, may interest some of your 

 readers. 



The pamphlet-box finally evolved after some 

 years of experiment is constructed thus: a solid 

 back of wood (a), to each side of which is 

 hinged (at h) a half-box (6). When closed, one 

 half slightly overlaps the other by a rebated 

 edge, so as to exclude dust ; they may be fast- 

 ened by a catch, but this is quite unnecessary in 

 the smaller and lighter makes. When open 

 both sides and back lie flat on the table ; or, if 

 space be limited, oue side can hang down over 

 the edge of the table or can be kept standing 

 up. In the lighter makes the sides are of paste- 

 board, and are hinged to the back by a linen 

 hinge (7(), the outside is all covered with stout 

 binder's cloth and the inside is lined with white 

 glazed paper. In the heavier makes (suitable 

 for large quartos or for a public library) the 



