Royal Astronomical Society. 



4-5r 



as an Appendix. The reasons which induced him to make this addi- 

 tion will be best understood by consulting the remarks at the begin- 

 ning of this Appendix. 



The author has also given a set of Tables for computing some very 

 minute corrections depending on twice the longitude of the moon's 

 ascending node {2. g ). He also gives some account of Mr. Baily s 

 Tables, computed for, and published by, the Astronomical bociety ot 



London. , , , , , 



Besides several other useful Tables, the author has added a ca- 

 talogue of 520 zodiacal stars liable to occultation, containing the 

 auxiliary constants for gaining the various corrections. This is ac- 

 companied bv another table referring the same stars to the catalogue 

 of the Astronomical Society. To these is added an arrangement ol the 

 above zodiacal stars in a table consisting of fourteen pages before 

 alluded to, in which the stars that may at a gwen tune be seen 

 occulted in Eno-land, are distinguished from those seen m any other 

 country, giving also the place of the moons node when the occulta- 

 tions may be expected. 



A Guide to the Carpenter's Rule. By Benjajiix Bkyan', Civil En- 

 gineer, London, 1832 ; r2mo. pp. 23. 

 We are informed in the preface to this pami^hlet, that "the Author's 

 mode of explaining the operations to be performed on the Slide-rule 

 has been some years before the public" in his larger treatise on this 

 instrument, and that it "is allowed to be superior to any other 

 hitherto published." The present treatise is confined to those opera- 

 tions which can readily be performed with the common Cari>enter s 

 Rule divested of the more extended formulae contained in the larger 

 one. ' For Schools, the author presumes, it " will be found useful in 

 teaching instrumental arithmetic, and qualifying the student for the 

 active pursuits of life.'' It consists of an Introduction, explainmg 

 the notation employed on the Rule, and of general formula with 

 examples, in the following arithmetical processes and branches ot 

 mensuration; viz.: Multiplication, Division, Proportion, Inverse 

 Proportion, Squares and Roots, Cubes and Roots, Mensuration ot 

 Superficies, Solid Measure, Brickwork, and Gauging. These formulae 

 and examples are all perspicuously and accurately stated ; and at 

 p 18, under the head " To estimate the comparative Strength oj Scant- 

 lin'TS used in Buildings," we find a very useful little table of the 

 numbers expressing the Comparative strength of various scantlings as 

 used in different buildings. 



LXXXIL Proceedings of Learned Societies. 



ROYAL ASTRONOMICAL SOCIETY. 



THE following is a list of such papers read before, and communica- 

 tions made to, this Society, during the session of 1831—32, as 

 have not already been noticed in our reports of its proceedings. 

 Third Series'. Vol. 1. No 6. Dec. 1852. ^ N 



