H,Prof. Poly tech. School at 



Stuff-art. Translated by A. Jay DuBois, Ph.D., Prof. Civ. and 

 Mech. Engineering, Lehigh University. Penm, with an Anpetidix 

 by R. H. Thurston, A.M., Pro£ ".Mech. Eujr., Stevens Inst, 



oboken, N. J. 21 

 plates. New York. 1877. (Johi 

 Dr. Weyrauch's work has special importance in this bridg< -lmihl- 



Technol., Hoboken, N. J. 210 pp. 8vo, with lour lithographed 

 T ■ Wiley A: Sons, 15 Astor Pla. * 



ing country. It treats of the method of 



steel structures, explain.- WbloePs important la w, sets forth a new 



ami improved method based on formula' original with Prof. 



Lai 1 rlt i 1 th ithor, and presents practical directions and 

 xperimental results, a h is essential to 



ruction. The translation was made by Professor DuBois, 



at the request of the author. 



8. The Chemists Manual: A practical Treatise <>» Chemistn/, 

 Qualitative <m</ <j>i<i,.t;t<itii> t .<„,,/,,,/> v,,/,, ,,,,■;,•>/. /;/>>>'■/„)„ 

 Analysis, J/i/jf r<i/, ,</</, .i.w/,y /,/,/, T<>. ••;,■<,/,,</,/. <pe., d-<:; bv Hkniiy 

 A. Mott, Jr., P.M.', 'Ph.D., Vto,' 625 pp. 8vo. New YoVk, 1-77. 

 (D. Van Nostrand). — This work is a eompend of chemical facts 

 and principles. The author has shown skill in the selection 

 of his materials, ami has derived them generally from the latest au- 



specific gravities and weights; formula- of frequently occurring 

 ; the table ol alcohols in atomic 

 series; poisons and antidotes, etc. ; Memlelej ff"s classification of 

 the elements, reproduce. 1 from Watts'- second supplement. Pnder 

 <) lai ■ itative analysis, are s< in m - and spe -iric instrtn tions for flu- 

 analysis of the more frequently occurring commercial products. 

 and in organic chemistry for wine, milk, sugars, both chemical 

 and optical, with much tiiat is not found condensed elsewhere in a 

 form so conveniently accessible. b. s. 



9. Astronoiu til J//// i,,,./,, Plamwakion's //,-t.., , ■>! th* 

 Hen reus ; by John P. Blakk. 482 pp. 12mo, with plate- and 

 wood-cuts. London, 1877. (Macmillan & Co.).— Tim 1 .itlo of this 

 work hardly does it justice; for while containim-; astronomical 

 myths, it gives in a popular way much of the early history of 



i - mm-thing of early notions in geography. 

 The chapters on the Pleiades is especially 'int. r -tin.. 

 out much on the year and festival times of the ancients, and on 

 the astronomical knowledge of the Egyptians and purposes of 

 the pyramids. It has chapters also on The Zodiac ; the origin of 

 the Cnstellatious; Pdipses and Comets; Astrology; time and 

 J 1 " ' ih-ndar; and m.ui\ ..t her -ubject-. all of which are treated 

 in a way to instruct and entertain. 



The Electric Bath; its medical uses, effects and appliances, by George M. 

 Schweig, M.D. New York: G. P. Putnam's Sons. 1877. pp. 134, 12mo. 

 Lecture Notes on Elemei 



Ihem. and Min. Pennsylvania College at Gettysburg. 

 m and adjustment of Series ; by E. L. DeForest. 52 pi 



