FOREIGN TRADE, EXCHANGES, &c. 

 This Day is published, in Two Volumes 410, Price 4I. 4s. in Boards, 



THE UNIVERSAL CAMBIST AND COMMERCIAL IN- 

 S i'RUCTC"!R ; being a full and accurate Treatise on Exchange j 

 including the Monies, Coins, Weights, and Measures, of all Trading 

 Nations and Colonies; with an Account of their Banks and Paphr 



CURKENCIES, 



By P. KFXLY, LL-D. 

 Master of the Finsbury Square Academy, London. 



This "Work is liberally patronised by the Bank of England, the East 

 India Company, the Board of Trnde, and by many of the first Mercantile 

 Houses. Ir is founded on the celebrated German P ib'ioation of Krosb, 

 entitled The Ilamburgh Ccnlcris^, which is here modernised, adapted to the 

 English Standard, and considtrably enlarged, especially in what relates to 

 the British Islands, to France and its Territories, to the East and West 

 Indie:", and to America, 



Among the numerous and important Additions introduced, are New 

 Tables of the Coins of all Nations, from Assays recently made both at 

 London and Paris, being a Revision of Sir Isaac Newton Tables, and a 

 Continualioi) of his Flan, by which the intrinsic Par of Exchange is deter- 

 mined. 



1 he Impressinns of the Coins ar." lik-wlse described, and thtir Inscrip- 

 tions, for the first time, rendered into English : the Science of Exchange 

 ii simplified and illustrated from recent operationf!; and the Work concludes 

 with a copious Index and Cumm^rcia! Diciio.iary. 



Published by LaLkiiigton, Allen, ai.d Co. ; Longman and Co. ; Cadcll 

 and Davica j Johnson and Co. ; and J. M. Richardson : 



Of whom may be had, by the same Author, 

 An Introduction to Stherics akd Nautical Astrondmy, the 



Fourth Ei'ition ; Price 10s. 6d. — 



The Elements of Book-keeping, the Fourth Edition; Price 6s. — 



and, recently published. 



Astronomical CoMPurATioNS, chiefly relating to Time and the 



Longitude j Price 5s. 



ENGRAVINGS. 



Vol. XL. A Plate to illustrate the Foundation of Mr. William Joniss 

 temporary Corn Rick. — Mr. J-tei'Hi ns's iN'Jethod of dividing Brick=i. — 

 Section of Mr. William Jones's temporary Corn Rick. — Mr. Waistell's 

 Improvem!.nt on the Acorn Dibble. — A Plate to illustrate Mr. Tawney's 

 New Thrashing Machi e. — Tw > Octavo Plates descriptive of a New Ma- 

 chine for Pumping Water. — Two Mates descriptive of the Muscular Mo- 

 tion of Snak-S. — Figures to i!lu trate such Poitions of a Sj)!icrc as have 

 Jbtir Attraction expressed by an algebraic Quantity — Van Helmont's 

 Differential Thermometer. — Formaticnof OvalsforGardeners.— Chavasse's 

 Marine Tr-ms't. — A Plate to illustrate Mr. Brodie's Experiments on 

 tlie Influence of the Brain on the Generation of Animal Heat. 



Vol. XLI. Pepys's Mercurial Voltaic Conductor. — Leslie's Dif- 

 fercnti.xl Thermometer. Diagrams to illustnue Dr. Wollaston's Peri- 

 scopic Camcru Obscura and Microscope. — Count Rumford's improved 

 Coffee-pots. — Mr. Goss's Instrument to work Addition of Numbers 

 •with Accuracy and Dispatch. — Mr. Davis's hanging Scaffold; <ind 

 Mr. Martis'9 Mciliod of relic, ing a Horse from a Cart when fallen 

 down in its Shafts.' 



