1815.] Scientific Intelligence. 8}5 



Result of lliree Rain GagfS. In. 100. 



No. 1. Ou a conical detached hill above the level of the sea 600 feet. . . . 33-84 



2. Centre of gaideu, 20 feet 2005 



3. Rinfauns Castle, 129 feet 15-59 



Mean of the three gages 2S'61 



VI. Royal Medical Society of Edinburgh. 



The Royal Medical Society of Edinburgh having agreed to 

 appoint a Committee for the purpose of receiving the communica- 

 tions of members, and of others through their medium, who may 

 favour the Society with interesting facts and experiments in Medi- 

 cine, or with unusual appearances in morbid dissection, beg leave 

 earnestly to invite the members to transmit such communications to 

 the Society as soon as possible. 



The Committee, consisting of six extraordinary members resident 

 in Edinburgh, together with the four Presidents ex officio, will 

 proceed immediately to consider such papers as may be transmitted 

 to them, with an ultimate view to publication. 



VII. On Imaginary Cube Roots. 



(To Dr. Thomson.) 

 SIR, 



You sometimes insert algebraical communications in yowr Ann ah 

 of Philosophy, I have lately discovered that all numbers have four 

 imaginary cube roots, which is contradictory to the generally 

 accepted theory, that " every equation has as many roots as it has 

 dimensions, and no more." 



The imaginary cube roots of the number 64 are — 2 ± \/ — • 12; 

 but the following quantity raised to the third power shows that it is 

 also a cube root of the same number 64. 



6ji^^? _ 3 + ^_ 3 v' - (V - A a/ - 3) 

 - V + -J ^/ - 3 



M\ + + (- 2 + 6 y - 3) ^/ - (V - -3 ^/ - •'i) 



