July 14, 1893. J 



SCIENCE. 



27 



to plant life. Methods of che:nxal amlysis are wUely left for a 

 separate work and the results of analysis alone are gii'en when a 

 knowledge of the same is necessary to an understanding of the 

 discussion. The nature of the experiments, however, and the 

 manipulation of the same, are given with sufficient fullness to 

 enable the reader to judge of the value of the conclusions. The 

 general arrangement of the book is as follows : Part I. treats of 

 the nutrition of plants, of germination, and of the origin of the 

 organic and inorganic constituents. Part II. makes a study of 

 the atmosphere in its relation to plant life and of the gases 

 infiueneing this life, of nitrogen, oxygen, carbonic acid, nitric 

 acid, ammonia, etc. Part III. treats of soils, their formation and 

 composition, and of their physical and chemical properties. A 

 bibliography, coinciding with the arrangement of the text, com- 

 pletes the work. 



The author is particularly interesting in his section on nitri- 

 fication and also in treating of the assimilation of free atmospheric 

 nitrogen by plants and soils. The experiments and conclusions of 

 Berthelot and Andre are noted as well as those of M. Schloesing, 

 the author concluding with; "II n'entre pas dans notre pro- 

 gramme d'insister davantage sur ces diverses recherches; car 

 nous teutons d'ordinaire a n'avancer que des faits positifs. Ici il 

 ne nous est guere permis de faire un choix entre les opinions 

 produites. II est a esperer qu'un procbaine avenir levera les 

 doutes qui regnent encore sur ce grave sujet." 



The book has the usual exquisite neatness of first-class French 

 publications, with full-bodied paper, clear print and broad 

 margins, making it altogether a most enjoyable volume. 



Charles Platt. 



Outlines of Forestry, or the Elementary Principles Underlying 

 the Science of Forestry. By Edwin J. Houston. Philadel- 

 phia, J. B. Lippincott Co. 254 p. 12°. $1. 

 This little book is a useful manual of facts relating to the sub- 

 ject. Among the matters considered are the conditions neces- 

 sary for the grow h of plants, distribution over the earth, forma- 



tion of soil, animate aid inanimate enemies of the forest, vapor, 

 rain, drainage, climate', hail, reforestation and tree planting, etc. 

 The last chapter, called " Primer of primers," contains in short, 

 concise sentences the substance of what had been given at length 

 in the earlier chapters. Taken by itself, it would serve a use- 

 ful purpose in the education of the general public to the import- 

 ance of the subject. 



The book is, perhaps, unfortunately written in a loose and 

 rather slovenly manner. It abounds in repetitions of not only 

 the same ideas, but also of nearly identical words. The fol- 

 lowing extracts are particularly bad examples, but they fairly 

 represent the ordinary style of the writer: " Heat and light are 

 to be found in practically all parts of the earth. They differ, 

 however, in amount in different regions of the earth, and such 

 differences cause the differences that are noticed in the plants 

 that grow in different regions " "The quantity of moisture in 

 the air differs greatly in different parts of the earth, and on this 

 difference, together with the difference in temperature, depends 

 the differences observed in the plants of various regions." " Each 

 section of the country possesses, so to sp^ak, a nationality in its 

 plants, or, in other words, there lives in each section of country 

 a particular nation of plants. Such a nation of plants, or the 

 plants peculiar to a particular section of country, is called its flora." 



The author makes use of a new word, " heatshine," which is 

 rather difficult to define. ' ' The sunshine and the heatshine which 

 awaken the sleeping germ and call it into activity," etc. In the 

 appendix are given var'ous lists of trees suitable for planting, 

 and these contain some curious errors. For example, under the 

 head of "deciduous trees" we find maples, hickories, cedars firs 

 and pines, while under "evergreens'' are placed spruce, larch, 

 sweet gum, poplar, oak, walnut, etc. In another place we ob- 

 serve under "conifers" bald cypress, red cedar, white pine, 

 black cherry and European alder, while the European larch fig- 

 ures in another table as an evergreeen. Errors of this kind 

 rather detract from the value of the book. 



Joseph F. James. 



Delicious 



Drink. 



Horsford's Acid Phosphate 



with water and sugar only, 

 makes a delicious, healthful and 

 invigorating drink. 



Allays the thirst, aids diges- 

 tion, and relieves the lassitude 

 so common in midsummer. 



Dr, M, H. Henry, New York, says: 

 "When completely tired out by pro- 

 longed wakefulness and overwork, it is 

 of the greatest value to me. As a bev- 

 erage it possesses charms beyond any- 

 thing I know of in the form of medi- 

 cine." 



Descriptive pamphlet free. 

 numlord Chemical Works, Providence, R. I. 



Tteware of Substitutes and Imitations. 



Exchanges. 



[Freeof charge to all, if ofsatisfactory character. 



Address N. D. C. Hodges, 874 Broadway, New York.l 



For sale or exchange. — A complete set of the re- 

 port of the last Geological Survey of Wisconsin, 

 T. C. Chamberlin, geologist. It consists of four 

 large volumes, finely illustrated, and upwards of 

 forty large maps and charts. Will sell for cash or 

 exchange for a microscope. Address Geo. Beck. 

 Platteville, Wis. 



For sale or exchange for copper coins or rare 

 postage stamps. Tryon's American Marine Conch- 

 ology, containing hand colored figures of all the 

 shells of the Atlantic coast of the United States. 

 Presentation copy, autograph, etc. One vol., half 

 morocco. 8vo, usual price, $*2'', postpaid. $15. Botany 

 of the Fortieth Parallel of the Hundredth Meridian 

 of the Pacific B. R. Survey. Other Botanical works 

 and works on Ethnology. F. A. Hassler, M.D., 

 Santa Ana, Cal. 



I have a fire-proof safe, weight 1,'50 pounds, 

 which I will sell cheap or exchange for a gasoline 

 engine or some other things that may happen to 

 suit. The safe is nearly new, used a short time 

 only. Make ofters. A. Lagerstrom. Cannon Falls, 

 Minn.. Box 857. 



For exchange.— Hudson River fossils in good con- 

 dition from the vicinity of Moore's Hill, Ind., also 

 land and fresh water shells. Desire fossils and 

 shells from other groups and localities. Address 

 Geo. C. Hubbari, Moore's Hill, Ind. 



For sale at low price. — A fine old-fashioned photo- 

 graphic camera, rosewood box, one foot squ-ire, 

 lenses, four inches diameter, made by C. C. Harri- 

 son Plateholders, troughs, baths, etc., all in large 

 wooden case, formerly the property of the late 

 President Moore, of Columbia College. This is a 

 fine example of an instrument of the best make for 

 the old wet-process methods, and valuable to any 

 institution or amateur interested in the history of 

 photography in the U. S. Address M. S. Daniel, 

 236 W. 4th St., New York. 



I wish to exchange a collection of 7,000 shells, 

 1001 species and varieties. American and foreign, 

 land, fluviatile and marine, for a good microscope 

 and accessories. Address, with particulars. Dr. 

 Lorenzo G. Yates. Santa Barbara, California. 



For exchange. — I wish to exchange Lepidoptera of 

 South Dakota and other sections, for Lepidoptera 

 of the world. Will purchase species of North Amer- 

 ica. Correspondence solicited, particularly with 

 collectors in the Rocky Mountains, Pacific coast 

 and Hudson's Bay regions. P. C. Truman, Volga, 

 Brooking county, boutn Dakota. 



Wants. 



A YOUNG man who has been through the course 

 in mathematics in Princeton University, 

 wishes some tutorirg this summer. Rates reason- 

 able. Address P. H Westcott, Cramer's Hill. Cam- 

 den Co., N. J. 



A GRADUATE of an American Polytechnic insti- 

 tution and of a German university (Gottingen), 

 seeks a position to teach chemistry in a college or 

 similar institution. Five years' experience in 

 teaching chemistry, AddressChemist, 7o7 Gary St , 

 Brockton, Mass. 



AN experienced teacher in general biology wishes 

 a position in a first-class college or university. 

 Three years in post-graduate study. Extensive 

 experience. Strong indorsements. Address E. W. 

 Doran, Ph.D.. 1327 G St., N. W., Washington, D. C. 



T 



HREE teachers wanted for a male and female 

 seminary in central New York. Typewriting, 

 etc . languages, mathematics, sciences, et. al. Send 

 stamp with and for particulars. Bos 701, Hemp- 

 stead, L. I. 



A ZOOLOGICAL collector and taxidermist of ten 

 years' experience in the field is now open to en- 

 gagement, for either field or laboratory work. 

 References furnished. Address Taxidermist, Box 

 75, White Sulphur Springs. WestVa. 



WANTED, as principal of a flourishing technical 

 school, a gentleman of education and experi- 

 ence who will be capable of supervising both me- 

 chanical and common school instruction. Special 

 familiarity with some technical branch desirable. 

 Address, giving age, qualifications, etc., J. B. Bloom- 

 ingdale. Fifty-ninth street and Third avenue, N. Y 



Tl^ANTED.— A young man as assistant in our 

 W microscopical department. Queen & Co., 

 Philadelphia. 



THE undersigned desires specimens of North 

 American Gallinae in the flesh for the study of 

 their pterylosis. These species are especially de- 

 sired: CoUnus ridgwayi^ cyrtonyx vionteznmae^ 

 dendragapus franklini, lagopustreIchi,tympanuchiis 

 cupido and pedioecetes phasianellns. Any persons 

 having alcoholic specimens which they are willing 

 to loan or who can obtain specimens of any of the 

 above are requested to communicate with Hubert 

 Lyman Clark. 3922 Fifth Avenue. Pittsburgh, Pa. 



