A WEEKLY {ILLUSTRATED JOURNAL OF SCIENCE 
“ec 
0 the solid ground 
Of Nature trusts the mind which builds for aye.”—WoORDSWORTH 
No. 5] 
AMBUOIRISIDYANT, IDSC! 
BER 2, 1869 
Registered for Transmission Abroad.] 
[All Rights are Reserved. 
ROYAL INSTITUTION OF GREAT BRITAIN. : 
ALBEMARLE STREET, PICCADILLY, W. 
LECTURE ARRANGEMENTS FOR 1869-70. 
Subscribers of Two Guineas are admitted to all the Courses. 
A Single Course, One Guinea, or Half-aGuinea. 
(Lecture Hour, THREE O'CLOCK.) 
Christmas Lectures (adapted to a Juvenile Auditory.) 
PROFESSOR TYNDALL, LL.D., F.R.S. Six Lectures. On Licut. 
On December 28th, 3oth, 1869 ; January rst, 4th, 6th, 8th, 1870. 
Before Easter, 1870. 
PROFESSOR HUMPHRY, M.D., F.R.S. Six Lectures. ON THE 
ARCHITECTURE OF THE Human Bopy. On Tuesdays, January 18th to 
February 22nd. 
PROFESSOR ODLING, F.R.S. Twelve Lectures. On THE CHEMIS- 
TRY OF VEGETABLE Propucts. On Thursdays, January 20th to April 7th. 
ROBERT SCOTT, Esq., M.A., Director of the Meteorological Office. 
Four Lectures. On Mereorotocy. On Saturdays, January 22nd to 
February 15th. 
‘DR. MASTERS, F.L.S. Two Lectures. ON Prant Lire as CON- 
TRASTED WITH THAT OF ANIMALS. On Tuesdays, March tst and 8th. 
PROFESSOR ROLLESTON, M.D., F.R.S. Four Lectures. Depuc- 
TIONS FROM THE COMPARATIVE ANATOMY OF THE NERvoUS SYSTEM. 
On Tuesdays, March rsth to April sth. 
PROFESSOR MAX MULLER, M.A., LL.D. Four Lectures. 
INTRODUCTION TO THE SCIENCE OF RELIGION. 
1gth to March reth, 
JOSEPH NORMAN LOCKYER, Esq., F.R.S. Four Lectures. 
THE Sun. On Saturdays, March roth to April gth. 
The Friday Evening Meetings before Easter will commence on January 2t. 
Tue Fripay Eventnc Discoursss will probably be given by Dr. Tyndall, 
Dr. QOdling, Professor Ruskin, Dr. Carpenter, Mr. Clifford, Professor 
Sylvester, Dr. Rolleston, Professor Roscoe, Professor Huxley, Professor 
Williamson, and Dr. Blackie. 
To the Friday Evening Meetings, Members and their Friends only are 
admitted. 
After Easter. 
PROFESSOR BLACKIE. Four Lectures. 
Lio AND PoviTicAL PHILosopuy. 
17th, 
PROFESSOR TYNDALL, LL.D., F.R.S. Seven Lectures. On Puysics. 
On Thursdays, April 28th to June oth. 
PROFESSOR ROBERT GRANT, LL.D., F.R.S. Seven Lectures. 
AsTRONOMY. On Saturdays, April 30th to June r1th. 
PROFESSOR SEELEY. Three Lectures. On History. On Tuesdays, 
May 24th, 31st, and June 7th. 
To Non-members the admission to all these Courses of Lectures is Two 
Guineas; to a Single Course of Lectures, One Guinea or Half-a-Guinea, 
according to the length of the Course. 
Gentlemen desirous of becoming Members are requested to apply to the 
Secretary. 
New Memeers can be proposed at any Monthly Meeting. When 
proposed, they are admitted to all the Lectures, to the Friday Evening 
Meetings, and to the Library and Reading Rooms; and their Families are 
admitted to the Lectures at a reduced charge.— Payment :—First year, Ten 
Guineas; afterwards, Five Guineas a year; or a composition of Sixty 
Guineas. 
Prospectuses (when prepared) may be had in the hall. 
H. BENCE JONES, Hon. Sec. 
VoL. I, 
An 
On Saturdays, February, 
On 
On THE PRINCIPLES OF 
On Tuesdays, April 26th to May 
On 
SHARPEY MEMORIAL. 
Ir _has_ been resolved, by a number of the Pupils and Friends of 
PROFESSOR SHARPEY, to establish a “‘Sharpey Physiological Labor- 
atory and Scholarship” in University College, as a permanent Memorial of 
his labours as a physiologist and as a teacher. It is further intended that 
either a Portrait or a Bust of Dr. Sharpey should be placed in this Physio- 
logical Laboratory, and that, if practicable, a Portrait-medal also should be 
struck, for distribution among his friends. 
This twofold Memorial will, it is hoped, express and record, in a gratifying 
and useful manner, not only the wide appreciation of Dr. Sharpey’s services 
as an exponent of Scientific doctrine; but as the affectionate regard enter- 
tained towards him as a counsellor and friend. Already t,500/. have been 
contributed for these objects. Further Subscriptions will be received, and 
detailed information given by the Treasurer, Sir William Jenner, Bart., 63, 
Brook Street, W. or by one of the Honorary Secretaries. 
Signed, on behalf of the Committee of the ‘‘ Sharpey Memorial,” 
JOHN MARSHALL, 10, Savile Row, W. 
J. RUSSELL REYNOLDS, 38, Grosvenor Street, W. 
Hon, Secs, 
Now ready, Third Edition, in royal 8vo. price 21s, with 225 Illustrations, 
(coloured Lithographs and Woodcuts). 
THE HEAVENS: an Illustrated Hand- 
book of Popular Astronomy. By AMEDEE GUILLEMIN. Edited by 
J. NORMAN LOCKYER, F.R.S., F-R.A.S. 
“Tf anything can make the study of astronomy easy and engaging to 
ordinary minds, it will assuredly be a work of the attractive style and hand- 
some—we may almost say sumptuous—aspect of M. Guillemin’s treatise on 
“The Heavens.’ It deserves to be spoken of with all praise, as one towards 
which author, editor, illustrator, and publisher have equally done their best. 
Of the translation itself we cannot speak too highly. It has all the force and 
freshness of original writing.”—Saturday Review. 
RICHARD BENTLEY, Publisher in Ordinary to Her Majesty, 
New Burlington Street. 
Now ready, in crown 8yo. with 58 Illustrations, 7s. 62. 
THE SUN. By Amedee Guillemin, Author 
of ‘The Heavens.’ Translated by DR. PHIPSON. 
RICHARD BENTLEY, Publisher in Ordinary to Her Majesty, 
New Burlington Street. 
Preparing. 
A NEW STAR-ATLAS; in 12 Circular 
Maps, thirteen inches in diameter, with two large Index-plates. (Including 
abe 6,000 Stars and 1,500 objects of interest). By RICHARD A. PROC- 
TOR, B.A., F.R.A.S., Author of ‘Saturn and its System,” &c. &e. : 
The object which Mr. Proctor has proposed to himself in designing this 
atlas has been to combine uniformity, simplicity, convenience, and complete- 
ness, with an adequately large scale and absence of Apprecable distortion. 
The Index-plates are Mr. Proctor’s gnomonic-maps, in themselves a complete 
elementary atlas, and containing the constellation figures (coloured). 
The maps will be photographed by Mr. Brothers, F.R.A.S., of 14, St. 
Anne's Square, Manchester, who will receive the names of subscribers. 
Price of the Atlas £1 to subscribers, afterwards £1'5s.; without the Index- 
plates 15s. to subscribers, afterwards pers 
Extract from a letter by Sir J. Herscuet.— T like the specimen map of 
your proposed set of charts very much. The distortion is so small as to 
obviate all doubt or inconyenience in comparing the chart with the sky. . . . 
Of course I can have no objection to your mentioning my high approval of 
this work.” e 
