98 THE AMERICAN MONTHLY. [May. 



order now is from a vertebrate animal to a protozoan ; then from yeast to a flowering 

 plant. The number of types has received several additions, and the following is the 

 list, those added being printed in italics : — Frog, Crayfish, Lobster, Earthwortn, Com- 

 mon Snail, Fresh-water Mussel, Hydra, Bell Animalcule, Amoeba, Yeast, Protococcus, 

 Spirogyra, Bacteria, Moulds, Charce, Pteris, Bean plant. The addition of the Earth- 

 worm and Spirogyra are especially to be commended, and the gastropod is also very 

 welcome. The value of the earthworm for biological instruction has been recognized 

 by Sedgwick and Wilson. It has been made the object of their most charming book 

 to give one an introduction to animal life. The additions to the old types are in the 

 application of new discoveries in methods, and especially the study of the embryology 

 of the animal types taken. On the subject of the frog 12 pages are added. 



Professor Huxley has added a preface to the new edition in which, concerning the 

 practical benefit of even a three or four months course in Biology, he very justly says 

 that it gives the medical student such a practical knowledge of the elements of anat- 

 omy, histology, embryology, and physiology as otherwise is not gained at all or only 

 at the expense of much precious time. The new book contains nearly twice as many 

 pages as the old one ; an appendix with many valuable technical suggestions. Like 

 the former work it is not illustrated. — O. 



Annual Report of the State Geologist of New fe}-sey for the year 188"/. By G. H. 

 Cook. Trenton, pp. 45. i map. 

 The principal work of the survey during the past year has been devoted to the 

 making of a map of New Jersey — a work which has been in progress for some time. 

 Besides this, some field work has been done, chiefly in the study of archaean rocks in 

 the northern part of the State. The report is accompanied by a topographical map 

 of the State on the scale of 5 miles to the inch. One of the most important practical 

 problems before the survey is to provide a proper water supply for the great cides, 

 especially Newark and Jersey City. These are now supplied from the Passaic river 

 at Belleville, where the water is contaminated by the salt water and by the sewerage 

 of Newark. In pursuance of this object a relief map has been constructed on a scale 

 of 5 miles to the inch. It is demonstrated that an abundant supply can be had about 

 the mountainous head-waters of the Passaic, and that this can be delivered to the 

 cities by the force of gravity alone from a distance of only 20 miles. — O. 



Exchanges. 



[Exchanges are inserted in this column without charge. They will be strictly limited to mounted objects, an 

 material for mounting.] 



WANTED. — Parasites and books on Parasites and other micro, subjects. Will give Anatomical, Pathologil 

 cal. Botanical, Micro-fungi, Zoophytes, Polycistins, Foraminifera, Parasites, and other slides in return. 



FRED. LEE CARTER, Gosforth, near Newcastle-on-Tyne, England. 

 Wanted, Diatomaceous earth from Megillanes, Bolivia, South America. Can give in exchange either Dia- 

 tomaceous earth from New Zealand or cash. E. MICHALEK, 



I. Fleischemarkt, No. i, Vienna, Austria. 

 Mounted sections of Foetal Lung (5 months), sections across entire lobe, ^^^^ in. thick, beautifully stained, in 

 exchange for first-class pathological slides. W. C. BORDEN, M. D., U. S. A., 



Fort Douglas, Utah. 

 Correspondence relative to exchange in microscopical material or prepared mounts. 



HENRY L. OSBORN, Hamline, Minn. 

 Wanted, earths, recent diatoms, and miscellaneous objects for mounting. Only first-class material offered or 

 desired. MARY A. BOOTH, Longmeadow, Mass. 



Fossil Dfatomaceous deposits (iharine) wanted from Bermuda, Virginia, Maryland, California, etc. 



L ELLIOTT, Ardwyn Villa, Aberystwith, Wales, England. 

 Labels for slides. EUGENE PINCKNEY, Dixon, 111. 



14'Otices. — All communications for publication should be addressed to Henry Leslie Osborn, Hamline 

 University, Hamline, Minn. 



Subscriptions, and all matters of business, should be addressed to the Manager, Chas. W. Smiley, P. O. 

 Box 630, Washington, D. C. 



Subscription price $1.00 PER YEAR strictly in advance. All subscriptions should end 7vith the De- 

 cember number. A pink wrapper indicates that the subscription has expired. A date on the wrapper in- 

 dicates the month to which payment has been made. 



Orders for slides advertised by A. J. Doherty in the Journals from January to April, 1887, may be sent 

 through the Business Manager, P. O. Box 630, Washington, D. C. 



A few copies of Leidy's Fresh-Water Rhizopods, of North America, can still be had at $5 00 per copy. — P 

 O. Box 630, Washington, D. C. 



Remittances should be rEade by postal notes, money orders, or by money sent in registered letters. Drafts 

 should be made payable in Washington, New York, Boston, or Philadelphia, to the order of the Manager. 



The first volume, i88o, is entirely out of print. The succeeding volumes will be sent by the publisher for 

 the following prices which are net :— Vol. II (1S81) complete, Ji so ; Vol. Ill (1882), out of print ; Vol. IV 

 (1883) complete, Ji. so; Vol. V (1884) complete, Ji. so ; Vol. V (1884), Nos. 2-12, $1.00 ; Vol. VI (1885), $1.50; 

 Vol. VII (1886), $1.00; Vol. VIII (1887), $1.00. As calls for Volume I sometimes occur, those persons having 

 copies to dispose of would do well to inform us, and to state their prices. 



