The Engineer's Slide Rule and Its Applications. 



A Complete Investigation of the Principles upon which 

 the Slide Rule is Constructed, together with the Method 

 of its Application to all the Purposes of the Practical 

 Mechanic. By William Tonkes. - - 25 cents. 



Rhymes of Science: Wise and Otherwise. 



By O. W. Holmes, Bret Harte, Ingoldsby, Prof. Forbes, 

 Prof. J. W. McQ. Eankine, Hon. E. W. Raymond, and 

 others. With Illustrations. Cloth, Gilt Title, 50 cents. 

 We advise all our readers into whose souls the sunlight of fun ever 

 enters to purchase this little book. " Making light of cereous things " 

 has been said, by a high authority, to be " a, wicked profession," but the 

 genius which can balance the ponderosity of an ichthyosaur upon the 

 delicate point of a euphonious rhyme, or bear aloft a bulky lepto- 

 rhyncus on the sparkling foam of a soul-stirring love ditty, is worthy- 

 worthy of a purchaser. Philadelphia Medical News. 



Instruction in the Art of Wood Engraving. 



A Manual of Instruction in the Art of Wood Engraving; 

 with a Description of the Necessary Tools and Apparatus, 

 and Concise Directions for their Use; Explanation of 

 the Terms Used, and the Methods Employed for Pro- 

 ducing the Various Classes of Wood Engravings. By 

 S. E. Fuller. Fully Illustrated with Engravings by the 

 author, separate sheets of engravings for transfer 

 and practice being added. New Edition, Neatly 

 Bound, - 50 cents. 



What to Do in Case of Accident. 



What to Do and How to Do It in Case of Accident. A 

 Bqok for Everybody. 12 mo., Cloth, Gilt Title, 50 cents. 



This is one of the most useful books ever published. It tells exactly 

 what to do in case of accidents, such as Severe Cuts, Sprains, Disloca- 

 tions, Broken Bones, Burns with Fire, Scalds, Burns with Corrosive 

 Chemicals, Sunstroke, Suffocation by Foul Air, Hanging, Drowning, 

 Frost-Bite, Fainting, Stings, Bites. Starvation, Lightning, Poisons, 

 Accidents from Machinery and from the Falling of Scaffolding, Gun- 

 shot Wounds, etc., etc. It ought to be in every house, for young and 

 old are liable to accident, and the directions given in this book might 

 be the means of saving many a valuable life. 



