GENERAL SCIENCE. 



849 



Plattes, G. Discovery of all sorts of Mines. See Barba : Collection 

 of Treatises. 



Plattner, Carl Friedrich. Die metalliirgischen Rostprozesse theoretisch 

 betrachtet. 8°. Freiberg, 1856. 



Playfair, John. Works ; with a memoir of the author [by James G. 

 Playfair ; and a delineation of his character by Francis Jeffrey] . 



4 vols. 8°. Edinburgh, 1822. 



Elements of Geometry, containing the first six Books of Euclid 



with two Books on the Geometry of Solids, to which are added 

 Elements of Plane and Spherical Trigonometry. 



8°. Edinburgh, 1795. 



— — Eighth edition, with additions by William Wallace. 



8°. Edinburgh, 1831. 



Illustrations of the Huttonian Theory of the Earth. 



8°. Edinburgh, 1802. 



See also Murray, J. 



Outlines of Natural Philosophy, being heads of Lectures 



delivered in the University of Edinburgh. 



2 vols. 8°. Edinburgh, 1819, '16. 

 The 1st vol. belongs to the third edit., and the 2nd to the second. 

 Playfair, Lyon. Industrial Instruction on the Continent : Introductory 

 Lecture. 8°. London, 1852. 



On the Food of Man in relation to his useful Work : Lecture. 



8°. Edinburgh, 1865. 



Address on Education, delivered at the Newcastle-upon-Tyne 



Congress of the Social Science Association, September 1870. 



8°. London, 1870. 



On Primary and Technical Education : Two Lectures. 



8°. Edinburgh, 1870. 



The Inosculation of the Arts and Sciences. (Presidential Ad- 

 dress, Birmingham and Midland Institute, 1870.) 8°. Birmingham. 



On Teaching Universities and Examining Boards. (Address, 



Edinburgh Philosoph. Instit.) 8°. Edinburgh, 1872. 



Report on Coal for Steam Navy. See De la BecJie and Playfair. 



Playfair, William. An Inquiry into the permanent causes of the 

 Decline and Fall of powerful and wealthy Nations. 



4°. London, 1805. 



Playford, John. Vade Mecum, or the Necessary Companion ; con- 

 taining Sir S. Morland's perpetual Almanack, the computation of 

 years, the reduction of weights and measures, the ready casting- 

 up any number of farthings, &c. ; the interest and rebate of 

 money ; the rates of post-letters, also the post-stages, the rates of 

 fares of coachmen, carr-men and water-men. 12°. London, 1679. 



Plaz, Ant. Guil* De Psedantismo medico : Panegyris medica. 



4°. Lipsia?, [1764.] 



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