188 B. Davis — Small closed Cylinders in Organ-pipes. 





No. 1. 



Paper cylinders. 







Amplitudes. 





Number of rows. 





2A 



2 



3 



6 



10 



•39 



3'2 



3-2 



2-6 



2'1 



•434 



2-6 



3*2 



2-5 



1-9 



•476 



2-3 



3'2 



2-5 



1-9 



•548 



2-3 



No. 2. 



3'2 

 Paper cylinders. 



2-4 



1-9 



Amplitudes. 





Number of rows. 





A 





v. 







2A 



2 



3 



6 



10 



•39 



6-5 



3' 



2-7 



2-3 



•434 



6' 



3' 



2-8 



2-3 



•476 



6- 



3'2 



2-9 



2-2 



•548 



6' 



No. 3. 



3*2 

 Paper cylinders. 



2-8 



2-2 



Amplitudes. 





Number of rows. 



A 





2A 



2 



3 



6 



10 



•39 



6- 



4'3 



3*9 



2* 



•434 



5*5 



4* 



3' 



. 2' 



•476 



5- 



4- 











•548 



5' 



No. 4. 



4- 

 Paper cylinders. 







Amplitudes. 





Number of rows. 



A 





2A 



2 



3 



6 



10 



•39 



7- 



5-5 



3'3 



2-8 



•434 



6-5 



5' 











•476 



6'5 













•548 















Here again it will be noticed that the space between the 

 cylinders slightly decreases with increasing amplitudes of 

 vibration. The space between the rows decreases as the num- 

 ber of rows increase. This result is somewhat different from 

 that obtained with the No. 2 and 'No. 5 capsule-cylinders, 

 while the same result was obtained as with the large No. 00 

 capsule-cylinders. The blanks in the columns with the larger 

 cylinders when several rows were used, are due to the fact 

 that the tone passed over into the next overtone before the 

 required amplitude was reached. This was probably due to 

 the effect of friction. The presence of so much obstruction 

 tended to form a node at this point, which is near the natural 



