124. REPOiiT— 1873. 



thought it would bo more convenient to give the work the date of 1809, as 

 this more properly represents the time of appearance than does 1850. 



T. XIV. Proportional logarithms for every second to 3", to 5 places. 

 This table only differs from T. 74 of Eapek in there being 5 instead of 

 4 places given. 



T. XV. Five-figure logarithms of numbers from 10 to 10,200, with the 

 corresponding degrees, minutes, and seconds. 



T. XVI. (pp. 382-472). Log sines, cosines, secants, cosecants, versed, co- 

 versed, suversed, and sucoversed from 0° to 45° at intervals of 15" (with 

 arguments also in time), to 5 places. The term " versed " (versos) is used 

 for semiversed sine for brevity, and so for the others ; the table thus gives 

 log 2 (1 i eos.r) and log | (1 + sin x). The log sines, cosines, &c. are on 

 the left-hand pages, and the log versed &c. on the right-hand pages. The 

 table, altered in arrangement so as to make it quadrautal, is reproduced in 

 Stansbukt, 1822. There are also given some small tables to convert arc 

 into time, and vice versa, on p. 472. 



These tables are all included under the heading ' Tablas logaritmicas y 

 tablas para convertir partes de circulo en tiempo y viceversa.' 



A list of errata in the London edition of 1809 is given at the beginning 

 of the edition of 1850. 



Roe. T. I. Seven-figure logarithms of numbers from 1 to 100,000, 

 with characteristics unscparated from the mantissas. All the figures of the 

 number are given at the heads of the columns, except the last two, which 

 run down the extreme columns ; 1 ... 50 on the left hand, and 50 . . . 100 on 

 the right-hand side. The first four figures (counting the characteristics) are 

 printed at the top of the columns. There is thus an advance halfway to- 

 wards the modern arrangement, and the final step was made by JohnXewton 

 (1658). This is the first complete seven-figure table that was published. It 

 is formed from Vlacq by leaving out the last three Ggiues, withoiit increasing 

 the seventh when they are greater than 500. 



T. II. Logarithmic sines and tangents for every hundredth part of a 

 degree (viz. -^^-jj-^y part) of the quadrant, semiquadrantally arranged, to 

 10 places, with characteristics, which, however, are separated by a comma. 



The work is very rare : the copy Ave have seen belongs to the lloyal Society. 



Rumker, 1844. T. I. Six-figure logarithms of numbers from 1000 to 

 10,000, arranged consecutively in columns and divided into decades, with the 

 proportional parts for each decade by the side of it. 



T. II. Log sines and tangents for every ten seconds to 2°, and log sines, 

 tangents, and secants for every minute from 0° to 45°, with ditlcrences, to 

 6 places ; the logarithms written at length. 



T. III. Xatural versed sines to every minute to 180°, with proportional 

 parts for the seconds, to (5 places. 



T. IV. Lofjarithmen-Sielc/ezeif, \iz. log versed sines for every minute to 12'', 

 to 6 jjlaces, with diifcrences for one second (corresponding to O"* 0™: the 

 table gives instead of — oo). 



T. XXIV. Proportional logarithms for every second to 3°, to 4 places ; 

 same as T. 74 of IIapeh. 



In all cases the logarithms are written at length. The other tables are 

 nautical. 



^Salomon, 1827. This Avork avc have not seen ; but as Eogg has given 

 a description of several of the tables, and we see no likelihood of meeting 

 with the book, we here give his account. There are 13 tables, of which 

 the most noteworthy are the following : — • 



