A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 
“To the solid ground 
Of Nature trusts the mind which builds for aye.” —WORDSWORTH 
No. 25] 
THURSDAY, APRIL 21, 1870 
Registered for Transmission Abroad] 
[All Rights are Reserved 
Fourth and very much enlarged Edition, 70 Plates, 4 Coloured, 21s. 
How to Work with the Microscope. By 
Dr. LIONEL BEALE, F.R.S. 
HARRISON, Pall Mall. 
NEW WORK BY DR. BEALE, F.R.S. 
Second Edition, 6s. 6d. 
Protoplasm; or Matter, Life, 
Eight Coloured Plates, with a new Section on MIND. 
JOHN CHURCHILL & SONS. 
MUTUAL LIFE ASSURANCE. 
THE SCOTTISH PROVIDENT INSTITUTION. 
HEAD OFFICE, 6, St. Andrew Square, Edinburgh. 
LONDON—I8, King William Street, E.C. 
THE 32ND ANNUAL Meeting was held at Edinburgh on 
March 30, 1870. 
P. GUTHRIE TAIT, Professor of Natural Philosophy, 
Edinburgh University, moved the approval of the Directors’ 
Report, which was unanimously adopted. 
Mind. 
The new business considerably exceeded that of the previous year. The 
subsisting Assurances at the close of the year were £6,806,834 gs.; the 
claims by death, 493,663 5s., being 40,000 less than the expectation, while 
the ratio of interest renewed had been nearly a half per cent. higher. The 
increase in the Funds was 4137,233 11s, being 51 per cent. of the gross 
receipts. Other particulars of the year’s business will be found in the last 
line of the following Table, which shows 
THE PROGRESS IN LAST EIGHT YEARS. 
New Accumulated 
In Year | Policies set Claims in Year.| Fund at end of| 
Issued. seurce: each Year. 
1862 792 | £372,460 456,776 £861,005 
1863 880 4555793 59,650 938,962 
1864 962 493,456 57,884 1,023,487 
1865 1030 501,906 53,123 1,133,472 
1866 1056 511,569 85,815 1,245,372 
1867 1373* 621,574" 80,413 1,365,305 
1868 1092 541,127 80,284 1,499,015 
1869 I1g9 581,036 93,663 1,636,249 
* Nore.—In these are included a considerable number of Short Term 
Assurances to secure contingent Bonues. 
IN THIS SOCIETY alone, Members can assure with right to Whole 
Profits at Moderate Rates. Other Offices have rates as low but without 
profits, or they give Profits but only on payment of excessive rates. 
Copies of the Annual Reports with full information may be had on appli- 
cation. 
Edinburgh, April 1870. 
Vou, I, 
JAMES WATSON, 
Manager. 
UNIVERSITY COLLEGE, LONDON. 
The PROFESSORSHIP of MATHEMATICS will be VACANT at the 
end of the present Session, in consequence of the resignation of Professor 
Hirst. Applications for the appointment will be received up to WEDNES- 
DAY, May 4th, at the office of the College, where further information may 
be obtained. 
JOHN ROBSON, B.A. 
Secretary to the Council. 
April r2th, 1870. 
BRITISH ASSOCIATION FOR THE 
ADVANCEMENT OF SCIENCE.—The next ANNUAL MEETING of 
this Association will be held at LIVERPOOL commencing on Wednesday, 
September 14, 1870. 
President Elect.—PROFESSOR HUXLEY, LL.D., F.R.S., F.G.S., 
President of the Ethnological Society of London. 
Notices of Papers proposed to be read at the Meeting should be sent to the 
Assistant-General Secretary, G. GRIFFITH, Esq., M. A., Harrow. 
Information about Local Arrangements may be obtained from the Local 
Secretaries, Liverpool. 
ROYAL INSTITUTION OF GREAT 
BRITAIN. 
ALBEMARLE STREET, PICCADILLY, W. 
Lecture Arrangements after Easter, 1870. 
(Lecture Hour, THREE o’CLOCK.) 
Subscribers of Two Guincas are admitted to all the Courses. 
A Single Course, One Guinea or Half-a-Guinea. 
PROFESSOR BLACKIE, FE.R.S.E. _ Four Lectures. On Morar 
Puttosorpny. On Tuesdays, April 26th to May x7th. Sudbserip~tion, Half~ 
a-Guinea. r 
PROFESSOR TYNDALL, LL.D., F.R.S. Seven Lectures. On 
Ecectric PHENOMENA AND THEORIES. On Thursdays, April 28th to June 
gth. Subscription, One Guinea. 
PROFESSOR ROBERT GRANT, LL.D., F.R.S. Seven Lectures. 
On THE AsTRONoMY oF Comets. On Saturdays, April 30th to June zzth. 
Subscription, One Guinea. 
PROFESSOR SEELEY. Three Lectures. On History. On Tues- 
days, May 24th, 31st, and June 7th. Sxbscription, Half-a-Guinea. 
The Friday Evening Meetings will recommence on April 29th (Professor 
Blackie : ‘ Interpretation of Popular Myths”). The succeeding Discourses 
will probably be given by R. A. Proctor, Esq., Canon Moseley, Professor 
Williamson, Principal Dawson, Professor Max Miiller, and Professor Odling. 
To the Friday Evening- Meetings, Members and their Friends only are 
admitted. 
Gentlemen desirous of becoming Members are requested to apply to the 
Secretary. 
New Mempers can be proposed at any Monthly Meeting. When pro- 
posed, they are admitted to all the Lectures, to the Friday Evening Meetings, 
and to the Library and Reading Rooms; and theit 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. 
April, 1870. H. BENCE JONES, Hon. Sec. 
rp 
