BOOK NOTICES. ■ 449 



is that upon the great cornet of 1881, which is illustrated by twelve drawings. 

 The observations were made by Prof. Holden with the fifteen and a half inch 

 equatorial and the zone eyepiece. Reports of observations of meteors, auroras 

 boreales, the transit of Mercury, etc., are also given. 



The State of Wisconsin is greatly indebted to Governor Washburn for the 

 magnificent gift of this Observatory with its valuable instruments and equipments, 

 and doubtless the work done in it will perpetuate his name far into the future of 

 scientific progress as well as add increased lustre to the fame of Professor Holden. 



Knight's New Mechanical Dictionary. Section II., Octavo, pp. 240; Ed- 

 ward H. Knight, A M., LL.D., Boston, 1882. Houghton, Mifflin & Co., 

 $2.00. 



This is Part II of the work so fully noticed in the August Review. It com- 

 mences with Cutting Machines and ends with Hydraulic Force-Pumps and Jacks, 

 giving minute descriptions and illustrations of thousands of machines, instruments 

 and processes. 



To give an idea of the extent and accuracy of the information furnished we will 

 say that about twenty pages are devoted to electrical subjects, including the electri-' 

 cal diapason, electrical machines, battery, cable, candle, clock, furnace, lights and 

 lamps of every description, writing apparatus, telephone, motor, etc. Explosives 

 are fully treated, also fire-engines, fireless locomotives, fuel, galvanic apparatus ; 

 gas and gas machines to the extent of nearly twenty pages; governors of all kinds, 

 grain separators, hand machines, heaters, horse-powers, hot-air engines, hydrau- 

 lic machinery, etc. In nearly all cases references to articles upon the different 

 subjects are given. This important and valuable work is to be completed in four 

 volumes at $2.00 each. 



Slight Ailments. By Lionel S. Beale, M D., F. R.S., octavo, pp. 283, cloth, 

 Philadelphia; P. Blakiston, Son & Co., 1882. For sale by M. H. Dickin- 

 son, $1.25. 



In this work the common diseases known as slight ailments, such as Indi- 

 gestion, Constipation, Biliousness, Sick-Headache, Neuralgia, Colds, Sore Throat, 

 Diarrhoea, etc., are taken up, their nature explained and proper treatment suggest- 

 ed. Professor Beale' s long experience as a practitioner and teacher enables him 

 to handle such subjects in an easy and popular manner, and at the same time to 

 keep within strictly professional bounds. The work is in its second edition al- 

 ready and cannot be excelled in usefulness as a family guide for the management 

 of any of the milder diseases such as are referred to above. 



