ids) 
bo 
NATURE [Wor 4, 1869 
EAs Revilla ES 
PLAIN AND EASY BOOKS FOR NATURAL HISTORY STUDENTS. 
1. HALF HOURS WITH THE STARS: a|\ 7. BRITISH MOLLUSCS (both Land and Fresh 
Guide to the Constellations, showing the Position of the Water). By R. TATE. Plain 4s., Coloured 6s. 
Principal Star Groups Night after Night throughout the ¥ F a 
Year. True for every year. Demy 4to. price 5s. 8. BRITISH REPTILES ; Lizards, Snakes, Newts, 
TOADS, FROGS, AND TCRTOISES. By M, C. 
2, HALF HOURS WITH THE TELESCOPE : COOKE. Plain 4s., Coloured 6s, 
a Popular Guide to the Use of the Telescope as a means of , {aa 4 = 
Armiement and Instruction. By R. A. PROCTOR, BA. 9- HALE HO ORS IV ITH THE MICROSCOPE. 
F.R.A.S. Fully Illustrated, price 25. 6d. 3y Dr. LANKESTER. With 250 Drawings by TUFFEN 
West. Plain 2s. 6d., Coloured 45, 
3. THE COLLECTOR’S HANDY-BOOK OF | 10. THE PREPARATION AND MOUNTING 
ALG, DIATOMS, DESMIDS, FUNGI, LICHENS, OF MICROSCOPIC OBJECTS. By THOMAS 
MOSSES, &c. By the Rey. W. W. SPICER, M.A. DAVIES. Price 2s. 6d. 
Feap. 8vo. cloth, 114 Ilustrations, price 25. 6¢. 
11. WILD FLOWERS WORTH NOTICE. By 
4. BRITISH FERNS. By Mrs. Lankester. 25. 6d. Mrs. LANKESTER. 4s. Coloured. 
ipl di COOGEE 12, 4 MANUAL OF STRUCTURAL BOTANY 
: 17 FOR THE USE OF STUDENTS AND CLASSES. 
5: Wee ae cee By M. C. Cooke. Aso) By M. C. COOKE, 300 Illustrations, price 1s., cloth 1s. 6d. 
2 ates, price 6s. 
Lin, 13. 4 MANUAL OF BOTANIC TERMS. By 
6. MICROSCOPIC FUNGI. By M. C. Cooke. M. C. COOKE. With upwards of 300 Illustrations, 
With nearly 300 Figures Coloured, 6s. price 25. 6d. 
Lonpon: ROBERT HARDWICKE, 192, Piccadilly, W. 
Now ready, super royal 8vo. cloth, price ros. 6d. 
A SUPPLEMENTAL VOLUME TO “ENTOZOA;” 
AN INTRODUCTION TO THE STUDY OF HELMINTHOLOGY. 
By T. SPENCER COBBOLD, M.D. F.R.S. 
CoNnTENTS:— 
On the history of the discovery of 7rrchina spiralis.—Account of successful feeding-experiments with Trichina spiralis.—On the rearing of the larve of 
Tenia mediocanellata by experiment with ‘‘proglottides.’—Further observations on the larvae of Twnza mediocanellata, with remarks on Cysticerci 
from mutton.—Additional successful experiments respecting Ynia medtocanellata, T. serrata, T. warginata, and 7. cenurus.—On the nature 
of certain Pseud-Entozoa found in diseased and healthy cattle.—On the comparative prevalence of different forms of Entozoa infesting the Dog, 
in relation to public health.—On the Entozoa of the common Fowl, and on those of Game-birds in general.—Observations on the Distoma clavatum 
of the Sword-fish, and on the so-called Déstoma elephantis of the Indian elephant.—On the question of Organic Individuality, Entozoologically 
considered.—Supplemental Bibliography.—Index of Authorities.—General Index. 
GROOMBRIDGE & SONS, s, Paternoster Row, London. 
GROOMBRIDGE’S SCIENCE MANUALS. 
Feap. 8vo. cloth, price 4s.; post free, 48 stamps. 
AN INTRODUCTION TO SCIENTIFIC CHEMISTRY. 
By F. S. BARFF, M.A., Cureist’s COLLEGE, CAMBRIDGE. 
Assistant to Dr. Williamson, Professor of Chemistry, University Colleze, London. 
SECOND EDITION. 
“This is the first volume of an educational series of elementary treatises about to be issued for students. The student who knows Mr. Barff's 
book in the way it is intended to be known, will haye a solid ground-work of chemical knowledge on which he may safely rear the more speculative 
branches of the science. For the purposes of clear instruction, for preparing for the earlier examinations, and last, though not least, for cheapness 
and excellence, we heartily recommend Mr. Barff's work to the notice of students.” —Lancet. 
Feap. 8yo. cloth, price 3s. 6¢., post free for 42 stamps. 
AN INTRODUCTION TO THE SCIENCE OF HEAT. 
By T. A. ORME, 
Teacher of Chemistry and Experimental Physics, University College School, London. 
The subject is so treated as to render it intelligible to all who have a knowledge of arithmetic, and special attention is paid to those parts of the 
science which are practically useful. 
Feap. 8vo. cloth, price 4s., post free for 48 stamps. 
AN ELEMENTARY COURSE OF MECHANICAL PHILOSOPHY. 
By RICHARD WORMELL, M.A., B.Sc. 
A suitable text-book for students preparing for the Matriculation Examination, London; Examination in Science (First B.Sc.); Examination in Arts 
(Second B.A.) ; Examinations of the Science and Art Department, and the competitions for the Whitworth Scholarships. 
GROOMBRIDGE & SONS, 5, Paternoster Row, London. 
