J [alley s Diving Bell. 
I § CIS L1ANIE 
\Triewalds. 
Via. 53. 
Diving | Bell. 
Fur. 54. 
Fia. 50. 
Fia. 51. 
Fia. 52. 
Spalding's U Diving Bell . 
Divisibility of Mailer. 
Fur. 61. 
I) r a i n s. 
B 
n Fia. 60. 
S n D 
Fia. 50. 
Fig. 58. 
J+V. 
