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APPENDICES 



gation in astronomical physics the results of which shall be made known to the public, such 

 results being in the opinion of the said National Academy of Sciences of sufficient impor- 

 tance and benefit to science to merit such recognition, provided however that said medal 

 shall not be presented or awarded more frequently than once in two years, and provided 

 also that the investigation for which it is awarded or the completed publication thereof 

 shall have been made since the time of the last preceding award and presentation of said 

 medal. 



Third. In trust that if discoveries of equal importance shall be made in astronomical 

 physics at or about the same time in the United States of America and also in some other 

 part of the world, each of which discoveries might in the opinion of said Academy entitle 

 the discoverer to be considered as a competitor for said medal, preference shall be given in 

 the awarding thereof to discoveries made by a citizen of the said United States of America. 



Fourth. In trust that if the said die shall at any time be lost, destroyed, broken, or in any 

 manner rendered unfit for the purpose of striking the said medal, a new die shall be pro- 

 cured exactly similar to the one so selected and presented as aforesaid, and shall be paid 

 for out of the interest and income of said fund ; and such sum or sums of money as shall 

 at any time or times be necessary for the proper care, custody and protection of the said 

 die or of the said fund hereby given, shall also be taken from and out of the interest and 

 income of the said fund whenever the same shall be deemed necessary by the said National 

 Academy of Sciences. 



Fifth. In trust that, if at any time or times the interest or income of the said trust fund 

 of Six thousand dollars shall exceed the amount necessary for the striking of said medal, 

 and the care of the said die and of the fund, such surplus over or above the sum or sums so 

 rquired for the purposes of the trust as hereinbefore recited and set forth shall be used in 

 such manner as shall be selected by said National Academy of Sciences in aid of investiga- 

 tions and work in astronomical physics to be made and carried on by a citizen or citizens of 

 the United States of America. 



And the said National Academy of Sciences doth signify its acceptance of the said fund 

 of Six thousand dollars, and doth engage to hold and manage the same upon the trusts and 

 for the uses and purposes herein mentioned and set forth. 



In Witness whereof, I, the said Mary Anna Palmer Draper have hereunto set my hand 

 and seal, and the said National Academy of Sciences hath hereunto caused its corporate seal 

 to be affixed and these presents to be subscribed by its President, this thirteenth day of 

 April, in the year eighteen hundred and eighty-three. 



MARY ANNA PALMER DRAPER, [SEAL.] 

 O. C. MARSH, [SEAL N. A. s.] 



President National Academy of Sciences. 



Sealed and delivered in presence of Edward H. Dixon, Mornay Williams, as to Mary 

 Anna Palmer Draper. 



Witnesses to signature of President Marsh: J. H. C. Coffin, Asaph Hall, Saml. H. Walker. 



Executed and acknowledged before Mornay Williams, Notary Public, New York Co. 



Acknowledgment of officer of the Academy before Saml. H. Walker, Notary Public, Diit. 

 of Columbia. 



THE WOLCOTT GIBBS FUND 

 MY DEAR PROFESSORS JACKSON AND LOEB: 



May I beg you to present to those from whom I received, a few days since, so signal a 

 mark of friendship and good will my heartiest, most earnest, and most grateful acknowl- 

 edgment? The address which I received on my seventieth birthday, signed by more than 

 zoo friends, pupils, and assistants, brings back my youth in recalling the names of those 

 who now join to offer me more than mere good wishes to cheer my advancing age. Their 



