300 Scientijk Intelligence. 



best works of its kind in the English language. The wood-cuts 

 are excellent and the style of the book is mechanically unexcep- 

 tionable. ^- F- B. 



5. A Series of Chemical Problems for use in Colleges and 

 Schools. Adajyted for the Preparation of Students for the Gor- 

 ernment Science and Society of Arts Examinations; by T. 1., 

 Thobpe, Ph.D., Professor of Chemistry in Anderson's Universiry. 

 Glasgow, with a Preface by Professor Roscoe, B.A., PhD. F.R>. 

 67 pp. I6mo. London, 1870. (MacMillan ; Manchester, Jami> 

 Gait & Co.) — This little volume contains an excellent collection of 

 practical problems, such as every chemist has to deal with, 

 founded upon the modern nomenclature and notation, with simple 

 formulae for their solution, and systematically and very clearlv 

 arranged. The best and most recent determinations are employet 

 as data, and an appendix contains a number of very usctu! 

 auxiliary tables of physical and chemical constants, loganthm^. 

 &c. The exercises relatin^^ to specific heat, latent beat, caloritio 

 power, and calorific intensity are especially fresh and valuabe. 

 The volume is well calculated to serve both as an aid to the 

 student, and as a practical reference book. a. w. w. 



II. Geology and Natural History. 

 1. California Geological Survey.— ^xev since the fii-st inaugu- 

 ration of this great work (in 1860), we have from time to time 

 given our readers accounts of its progress, reporting t^^" -""if^oi 



attention to lue mgn auiiity aiiu exc-tiiitut t ^ , ,, ., 



labors were carried on, and expressing our hearty desire tor lu 

 continuance, and completion upon the scale on which it was begun. 

 Only two months ago (above, p. 70), its last published report a\.i^ 

 noticed in this Journal-the first volume of Ornithology, conta n- 

 ing the land birds of the western side of the continent. Mi 

 then, the edition of the same with colored figures has appeare^'^^'^^j. 

 fully justifies the expectations entertained of it. ^^'^.^ggie 



giving highly colored illustrations in the text itself, on the s. _^ 

 page with the letter-press, is quite new, and its success, wni*.^ 

 complete, will be likely to make an era in the history of ifsti ^^^ 

 works on natural science. The admirable quality of the m 

 used, and the skill of the colorist, have united to produce a 

 which must satisfy the most critical taste. . +ije 



The second volume of Ornithology, which will contain ^^ 

 water-birds of the whole country, is in process of pr^pa .j.^. 

 The volume of Conchology, which Dr. Carpenter undertakes, ib ^^^ 

 wise begun ; and Prof. Brewer of Yale, formerly assistant^o^^^^ 

 survey, is rapidly working up the botanical i^^atenal tor p 

 tion, aided by Prof. Gray, and by others specially q^^Jified/^f^ted 

 work. The abundant collection of mammalian fossils is cou 

 to Dr. Leidy for treatment. The fossil botany is underta^ 

 Prof. Lesquereux. The volumes already issued contain a ^^^^^ 

 tions and figures of the invertebrate fossils by Mr. r- 



