462 PROCEEDINGS OP THE IMEBICAM ACADEMY. 



made for the purpose, the rate i-. as given in the table, 512 vibrations. 

 Notches have been cut in certain places, apparently to give the "local 

 pitch " used 1>\ the choir. When adjusted by these •■ • No. S 1 1, the i 

 i- 518, practically French pitch. The frequency of vibration of such a 

 pipe is of co ur.se greatly influenced by the temperature. This pitch pipe 

 was used in a church in West Town-. -inl, .Mas-., early in the present 

 century, and its pitch was adjusted to that in use in Boston. 



\ 10 is a Coenig fork already referred to. made for the Massachu- 

 setts Institute of Technology in 1*7.3, and used a- the basis of measure- 

 ments by Cross and -Miller in l.sjso. Like all of Koenig's fork-, prior to 

 the establishment of his new standard in 1880, it is a little sharp. Nos. 

 11, 11, 95, 110 are forks made by .Mr. E. Greaves. No. !-'i, the stan- 

 dard ('.; of E. S. Ritchie and Sons, was procured from DuIiommj of Paris 

 at a date prior to 1870. It has the inclined proogs of the Marloye forks. 

 Nos. 19, 31, 87, are large forks made for the University of Virginia by 

 E. S. Ritchie and Sons more than twenty-five years since. No. 1' 1 is a 

 pitch pipe deposited in the library of Yale University by the class of 

 1826, and kindly rated by Professor A. \Y. Wright. No. 102 LB the 

 same pipe wlen set to give A . When properly blown it gives, substan- 

 tially, French pitch. No. 26 is a fork used by Miller and Sons as their 

 standard for piano pitch in 1884. No. 29 is one of a pair of large forks 

 on resonating boxes made in 1883, for the purpose of tuning the Chicker- 

 ing piano when used in the Boston Symphony Concerts, the orchestra 

 having adopted the French pitch. It was tuned from No. 27. The firm 

 desired to tune the piano from C rather than from A. No. 32 is a la 

 tempered C fork, adopted in 1884 by the Chickerings for toning pianos 

 to be used with orchestras employing the French pitch. No. 35 is the 

 standard French Pitch of the Mason and Hamlin Co. The fork No. 

 is lowered in pitch by attaching to each prom: by wax a small rectangular 

 piece of steel. No. 36 is a fork of G. S. Hutchings and Co;,used in tun- 

 ing the organs made by them. No. 37 is a line pipe belonging to the 

 I look and I las tings Organ Co.. and giving the pitch proposed by Theodi ire 

 Thomas in 1883. Nos. 38, 3'.», 40 give ratings under different conditions 

 of a large standard fork made by Ritchie and Sons for the New England 

 Conservatory of Music in 1882. No. 48 is the same as measured in 1S83. 

 The fork has flattened by a considerable amount since its manufacture, 

 from unknown causes. It has apparently been kept with care. The box- 

 has a considerable influence upon the pitch of the fork. No. 12 is a fork 

 belonging to Mr. Levi K. Fuller, giving the pitch which wis used in 

 opera in 1882 by Fatti. It is a little sharp of French pitch, tbou-li 



