NATURE 
| March 31, 1870 
LATHES, CHURCH AND TURRET CLOCKS, BELLS, &c 
L2COOKE AND S0Ns; 
CLOCK AND LATHE MAKERS TO HER MAJESTY’S HOME AND INDIAN GOVERNMENTS, 
BUCKINGHAM WORKS, YORK 
Lists of Church, Turret, and other Clocks, made and erected, and Bells supplied and hung by T. COOKE and SONS. Also Illustrated Catalogues o 
Lathes, Planing, Sawing, Copying, and other Machines, may be had onapplication to the Works. 
PELICAN LIFE INSURANCE COMPANY, 
Established int 1797, 
zo, LOMBARD STREET, CITY, and 57, CHARING CROSS, 
WESTMINSTER. 
Directors. 
Kirkman D. Hodgson, Esq. 
Henry Lancelot Holland, Esq. 
Sir J. Lubbock, Bart., M.P., F.R.S. 
John Stewart Oxley, Esq. 
Henry R. Brand, Esq., M.P. 
Octavius E. Coope, Esq. 
John Coope Davis, Esq. 
Henry Farquhar, Esq. 
Charles Emanuel Goodhart, Esq. Benjamin Shaw, Esq. 
Jas. A. Gordon, Esq., M.D., F.R.S. Marmaduke Wyvill, jun., Esq. 
FINANCIAL POSITION. 
Total Amount Insured, with Bonus Additions . . £3,007,431 
Liability on the same at 3 percent. Interest 846,712 
Accumulated Funds . a, tee OF ing Geo 1,227,253 
Annual Revenue from Premiums » £92,787 
5 55 from Interest 57,163 
149,050 
The whole invested in Governmnent, Real, and other Ristelssncniuess 
in addition to which the assured have the guarantee of a large and wealthy 
proprietary. 
For Prospectuses and Iorms of Proposal, apply at the Offices as above, or 
to the Agents of the Company. 
ROBERT TUCKER, 
Secretary and Actuary. 
‘ NATURE” PORTFOLIO, TO HOLD 
NUMBERS or PARTS, can be had for Two Shillings of the Publishers. 
| 
Mr. DURR of LEIPZIG has been ap- | 
pointed Agent to the Publishers of “NATURE” for GERMANY and 
EASTERN EUROPE. Books For Review, OrpDERS, and ADVERTISE- 
MENTS may be forwarded direct to him. Address: ALpHoNs Durr, Leipzig, 
Germany. 
Price One Shilling, Monthly, 
MACMILLAN’S MAGAZINE. 
No, 126, for APRIL. 
CoNnTENTS. 
1. MR. J. H. FYFE on “SIR GEORGE CORNEWALL LEWIS.” 
2. “A BRAVE LADY.” By the Author of “‘ John Halifax, Gentleman.” 
(Concinded). 
3. “CONSULTATIVE COMMITTEES IN MATTERS ECCLESI- 
ASTICAL,” With Preface by A. P. S. 
4. “IL PLEUT,”’ and “BEAU TEMPS.” 
5. MR. E. A. FREEMAN on “‘ THE ORIGIN OF THE ENGLISH 
NATION.” Lecture IT. 
6. MR. W. J. PROWSE on “SMOLLETT AT NICE.” 
7. “BLANCHE TREGUIER.” 
8. 
. THE DEAN OF WESTMINSTER'S 
TRANSFIGURATION.” 
. “PHILOSOPHERS AT PLAY.” 
. SIR M. DIGBY WYATT on “'ORIENTALISM IN EUROPEAN 
INDUSTRY.” 
“HYMN ON THE 
Volumes I. to XXI. handsomely bound in cloth, price 
7s. 6d. each, are now ready. 
NOTICE.—MACMILLAN’S MAGAZINE for MAY will contain the 
commencement of a NEW STORY by MR. ANTHONY TROLLOPE, 
Heeaariencce monthly; also a NEW POEM of 800 lines by GEORGE 
MACMILLAN & CO., LONDON. 
Sold by all Booksellers, Newsagents, and at all Railway Stations. 
Brage’s Vegetable Charcoal or Pure 
CARBON BISCUITS, a nutritious, pleasant, and healthful diet, which has 
produced great benefit and positive relief to thousands of sufferers from 
| indigestion, bile, acidity, foul breath, dyspepsia, heartburn, worms, &c. 
There is medical testimony to its beneficial effect in these complaints.—Sold 
in tins, 15., 25., 4s., and 8s. each, by all chemists, and by the manufacturer, 
| J. L. BRAGG, 14 (late 2), Wigmore Street, Cavendish Square. 
BROWNING’S NEW POCKET 
MICROSCOPE. T%e Best Companion for the Seaside. The instrument 
complete, with good objective and large field eye-piece, in morocco case, 
4t 118. 6d. ; or with two objectives, one-inch and two-inch dipping-tube, 
forceps, glass plate, &c., £2 25. 
Joun Brownina, Optical and Physical Instrument Maker to the Royal 
Observatory, &c., &c., rrr, Minories. Prize Medal 1862. Established 100 
years. 
SCHOOL OF CHEMISTRY, 
20, GREAT MARLBOROUGH STREST, 
LONDON, W. 
Direcrep py ARTHUR VACHER. 
No. XXXVIII., APRIL, PRit& 4s. 
THE QUARTERLY JOURNAL OF 
MICROSCOPICAL SCIENCE. 
ConTENTS. 
MEMOIRS :— 
On some Freshwater Rhizopoda, new or little known. By William 
Archer (continued), 
On Imbedding Substances for Microscopic Section. 
M.D., Fulletian Professor of Physiology. 
The Grey Matter of the Cerebral Convolutions. 
of Galway. (Plate VII.) 
On the Embryonic Form of Nematobothrium filarina, Van Ben. 
Dr. Edouard Van Beneden. (Plate VIII.) 
Remarks of Opalina and its Contractile Vesicles, on _Pachydermon and 
Annelidan Spermatophors. 3y E. Ray Lankester, B:A. Oxon. 
(Plate IX.) 
On Microscopic Illumination. By John F. Higgins, A.M., M.D. 
(Read before the American Microscopical Society of the City of 
New York.) 
On the Relation of Assimilation and Secretion to the Functions of 
Organic Life. By J. Gedge, M.B., Cantab., M.R.C.S. 
High-Power Definition and its Difficulties and the Visibility of Diato- 
maceous Beading. By G. W. Royston-Pigott, M.A., M.D., Can- 
tab., M.R.C.P., F R.A.S, formerly Fellow of St. Peter's College, 
Cambridge. (Plate X.) 
Index to Diatoms figured in the ‘‘ Quarterly Journal of Microscopi 
Science,” from 1853 to 1867. By C. J. Muller, Esq. 
REVIEW :— 
The Cell Doctrine ; its History and Present State. 
M.D. 
NOTES AND CORRESPONDENCE, 
QUARTERLY CHRONICLE OF MICROSCOPICAL SCIENCE = 
Histology. 
Embryology, 
PROCEEDINGS OF SOCIETIES =~ 
Dublin Microscopical Club. 
Brighton and Sussex Natural History Society. 
Royal Microscopical Society. 
JOHN CHURCHILL & SONS, New Burlington Street. 
le 
By M. Foster, 
By Professor Cleland, 
By 
By James Tyson 
Printed by R. Cray, Sons, & Taytor, at 7 and 8, Bread Street Hill, in the City of London, and published by Macmitian & Co. 
at the Office, 63, Bleecker Street, New York —Tuurspay, March 31, 1870, 
