339 



Medical News and Library. June, 1860. — From the pitblisliers. 

 Ann. Report (27th), Philada. Board of Trade (170 pp. bound), 



1860. 

 Rep. Sup. Com. Schools of Pennsylvania (bound, 300 pp.), 1859. 

 Sabrie's Book Circular, Nos. 6, 8. 1860. 

 Blanchard & Lea's Book Circular. 1860. 

 African Repository. May, 1860. 

 On Numerical Relations existing between the Equivalent Numbers 



of Elementary Bodies, by M. Carey Lea, part 2. From the Am. 



J. of Sci. and A. XXIX. May, I860.— i^rowi the autlior. 

 Pacific Railroad Reports, Vol. XI, House of Representatives. 1859. 

 Pacific Railroad Reports, Vol. XI, Senate. Washington. 4to. 

 Astronomical Journal. Cambridge, No. 134. — From the editor. 

 R. Isti. Lomb. List of members, <fcc., 4to. 4 pages. 

 On the Alloys of Copper and Zinc, by Frans. H. Storer (from the 



Mem. of Am. Acad. Nat. Sciences, viii), 4to. 56 pp. pamph. 



Dr. Bache announced the decease, on the 5tli of June last, 

 of Samuel B. Ingham, a member of this Society, in the 80th 

 year of his age ; and Judge Sharswood was requested to pre- 

 pare an obituary notice of the deceased. 



Dr. Bache announced also positive intelligence of the de- 

 cease of Mr. H. S. Tanner, a member of this Society, having 

 taken place some two or three years ago. 



Mr. Lesley described a self-registering combined thermome- 

 ter and barometer, made and kept at work by Mr. Becker, 

 mathematical instrument maker, in Columbia Street, Brook- 

 lyn, New York. A chronometer movement causes a small 

 slate to advance for twenty-four hours from one end of a box, 

 towards a Becker compound aneroid pile at the other end, 

 armed with two long slender brass tentacles, between the 

 ends of w^hich the slate passes forward. Small slate-pencils, 

 at the tips of the tentacles, are made to touch the two sides 

 of the slate simultaneously, five minutes before each of the 

 twenty-four hours of the day, and are simultaneously removed 

 five minutes after each hour. The record-curves (barometric 

 on the one side of the slate, and thermometric on the other), 

 consist therefore of short lines, each ten minutes long. At 

 the end of the twenty-four hours, a detent shoots the slate 

 back and a new record begins. Instead of a slate, paper 



