the Journals of the late Reuben Burrow. 



203 



establishment." He has seen most of the works mentioned in 

 the preceding list, endorsed as a Deposited by Reuben Burrow," 

 and he has no doubt " that all of them are still in preservation 

 in the Library of the Royal Artillery." 



Several rude sketches of instruments used in surveying, and 

 a few diagrams relating to some now well-known mechanical 

 problems, occur in different portions of this volume, but none of 

 them of sufficient importance to merit transcription. A memo- 

 randum to u put the method of taking sections through hills, and 

 also with the Level," taken in connexion with the " sale of Alma- 

 nacks" previously noticed, renders it probable that he published 

 something similar to Carnan's Diary during his residence in 

 India. Should this conjecture prove correct, the following pro- 

 blems, with which I will conclude the notices of these Journals, 

 were no doubt intended to form a portion of the contents of one 

 of the numbers. 



Problem I. 



" Given the angles BRA, ARS, BSR, BSA, and the side AB, 

 to construct the figure : — that is to find the points R and S. 



" Construction. — On 

 AB describe segments 

 of circles to contain 

 the given angles BSA 

 and BRA, also pro- 

 duce AB both ways to 

 m and n. Make the 

 anglemBN= the angle 

 RSA, and draw BN ™ 

 meeting the circle BSA in N; — also make the angle wAM=the 

 angle SRB, and draw AM meeting the circle BRA in M; join NM, 

 and it will meet the segments in R and S, the points required." 



Problem II. 



" If the three points A, B, C are given, and from D and E the 

 angles ADC,CDE,DEB, 

 and BEC be observed; 

 required to determine 

 the points D and E." 



Construction. — Mr. 

 Burrow merely enun- 

 ciates this problem, but 

 its construction may rea- 

 dily be supplied as fol- 

 lows: 



On AC and BC de- 

 scribe segments of cir- 

 cles to contain the angles 



