loo THE POPULAR SCIENCE MONTHLY. 



PROFESSOR TYNDALL'S DEED OF TRUST. 



I JOHN TYNDALL, Professor of Natural Philosophy in the Royal 

 ) Institution of Great Britain, having, at the solicitation of my 

 friends, lectured in various cities of the United States, find the receipts 

 and disbursements on account of these lectures to be as follows : 



I. RECEIPTS. 



From Boston, for six lectures $1,500 00 



" Philadelphia, for six lectures 3,000 00 



" Baltimore, for three lectures 1,000 00 



" Washington, for six lectures 2,000 00 



" New York, for six lectures 8,500 00 



" Brooklyn, for six lectures 6,100 00 



" New Haven, for two lectures . 1,000 00 



Total receipts $23, 100 



II. DISBUESEMEjSTTS. 



Before leaving England : wages of assistants during the preparation of the lect- 

 ures ; work of philosophical-instrument maker ; new apparatus ; sundry 

 items for outfit ; travelling expenses of myself and two assistants from 

 London to New York make a total of 671 6s. 8d. which, at the rate of 

 $5.60 per pound, amounts to 3,692 31 



In the United States : hotel and travelling expenses for myself and two as- 

 sistants ; other expenses incidental to lectures in Boston, Philadelphia, 1 

 Baltimore, Washington, New York, Brooklyn, and New Haven covering 

 a period of four months plus travelling expenses of myself and my 

 assistants from New York to London make a total of 4,749 35 



Present to Yale Scientific Club 250 00 



Salaries to assistants for four months, 250, which, at $5.50 per pound, 



amounts to 1,375 00 



Making the total disbursements $10,066 66 



rii. 



The total receipts are $23,100 00 



The total disbursements 10,066 66 



Making the net proceeds of lectures $13,033 34 



As an evidence of my good-will toward the people of the United 

 States, I desire to devote this sum of $13,033 to the advancement of 

 theoretic science, and the promotion of original research, especially in 

 the department of physics, in the United States. 



To accomplish this object, I hereby appoint Prof. Joseph Henry, 



1 At Philadelphia I had no hotel expenses, but was most comfortably lodged at the 

 house of my kinsman, General Hector Tyndale. He, I may add, paid his own hotel ex- 

 penses wherever he accompanied me. 



