488 Letters from Benjamin Franklin 



To [Barbeu] Dubourg. 1773. May 28. London. 



Will forward what remarks he has made when he finishes examin- 

 ing the rest of the sheets. Is obliged to him for proposing to insert 

 the letter as written from Dubourg to Franklin. Remarks on the 

 papers relating to the powder magazine. Wishes that some chemist 

 with a knowledge of electricity, would work on glass with Dubourg's 

 views, this would prevent misunderstandings and contradictory senti- 

 ments when the same experiments are performed by different persons. 

 Cause for the breaking of the glass bottles when highly charged in the 

 Leyden experiment. His globe, that could not be excited, is of a dif- 

 ferent composition from the other glass. Dubourg's Para Tonnerre. 

 (Incomplete.) A. Dr. of L. S. 4 p. XLV, 64. 



To [Jean Baptiste] Le Roy. 1773. June 22. London. 



Hospitals. Effect of fresh air on diseases. A. Dr. of L. S. i p. 



XLV, 65. 

 Printed in Works (Sparks, VI, 385; Bigelow, V, 151; Smyth, VI, 59). 



To M. [Jean] Rozier. 1773. June 22. London. 



Thanks him for his polite letter and the present of his valuable 

 collection. Has purchased of M. Magalhaens [John Hyacinth Magel- 

 lan] all the numbers of small form. Thinks it must prove a useful 

 work in science and wishes it success. A. Dr. of L. S. i p. XLV, 66. 



To [Barbeu] Dubourg. 1773. June 29. London. 



A list of errata in the French translation of the Works of Franklin. 

 The causes of taking cold. A. Dr. of L. S. 2 p. XLV, 67. 



Printed, in part, in Works (Sparks, VI, 387; Bigelow, V, 153; Smyth, VI, 6i). 



To Dr. [Matthew] Maty. 1773. July i. London. 



Mr. [John] Walsh intended to draw up an account of the numerous 

 experiments on the torpedo, but his other avocation has not permitted 

 him to execute it. Has lately received permission to lay before the 

 [Royal] Society what Mr. [John] Walsh had communicated to him. 

 A. Dr. of L. S. I p. XLV, 68. 



Printed in Works (Smyth, VI, 72). 



