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AUSA DYNAMICA, 
CONCERNING 
FORCE, IMPULSION, AND ENERGY. 
By JOHN O'TOOLE . 
Dublin: HODGES, FIGGIS, & CO. 
London: SIMPKIN, MARSHALL, & CO. 
SOLAR PHYSICS. 
By A. H. S WIN TON, 
Member of the Entomological Societies of London, New York, 
and Stettin ; Correspondent U.S. Ent. Commission, &c. 
Price 7 s. 6 d., in Ornamental Cover, Illustrated. 
“ The table of Sun Cycles is explained, and with a clear apprehension of 
this the reader can post himself up in knowledge, the mere idea of which would 
have stunned his ancestors.” — Surrey Advertiser. 
“ Allow the Sun spots to have a definitely recurrent period of increase and 
decrease, many observers have traced a corresponding cycle in the occurrence 
of heat-waves, earthquakes, tempests, floods, abundant crops, inroads of 
destrudtive inserts, &c.” — Journal of Science. 
“ Mr. Swinton has here expended on this research an immense amount of 
time and labour. The influence of the solar spots has been suspedted by the 
greate t minds of the age.” — Liverpool Mercury. 
“ The subjedt is one of great interest, and is deserving of public attention.” 
— Glasgow Evening Times. 
L ondon: W. H. ALLEN~ & C 0. 
In Royal 8vo. cloth, price 3s .6d. (post free, 3s. iod.), 
MICROSCOPICAL ' MANIPULATION. 
By W. T. SUFFOLK, F.R.M.S. 
Illustrated with Forty-nine Engravings and Seven Lithographs. 
Chapter I. — Construdtion of Microscope. Chapter II. — Mechanical Processes. 
Chapter III. — Mounting Objedts Dry and in Balsam. Chapter IV. — Mounting 
Objedts in Fluid. Chapter V. — Illuminating Apparatus. Chapter VI. — 
Polarised Light. Chapter VII. — Drawing and Micrometry. Appendix. 
London : E. J. DAVEY, Boy Court, Ludgate Hill, E.C. 
A High-Class Spiritualist Journal. 
LIGHT: 
A Weekly Journal devoted to the Highest 
Interests of humanity both here and hereafter. 
“LIGHT! MORE LIGHT!”— Goethe. 
The Contents of the paper comprise (1). Original Articles on the Science 
and Philosophy of Spiritualism. (2). Records of Fadts and Phenomena, both 
Physical and Mental. (3.) Miscellaneous Literature connedted with the 
movement, including Poetry and Fidtion. (4). Reviews of Books. (5). Resume 
of the Periodical Press, both British and Foreign, devoted to Spiritualism and 
allied subjedts. (6). Questions and Answers. 
Price 2d., or 10s. 10 d. per annum, post free. 
London : E. W. ALLEN, it, Ave Maria Lane, E.C. 
