258 TENTH ANNUAL REPORT, ETC. 



until the cistern and tube are just full. If it is screwed more than 

 this, the mercury maj be forced through the joints of the cistern. It 

 sliould then he inverted and carried cistern-end upwards. 



This instrument is well adapted for service as a mountain baro- 

 meter, and when used as such is packed in a leather case with suit- 

 able straps for convenient carriage, 



