On an 



for Gas-analysis 391 



us parts will be more apparent, and the measure in which 



fulfil their end more correctly appreciated. 



First of all, the size of the instrument must be reduced to a 



minimum ; nor must its shape be so eccentric as to interfere 



with it- bring packed into a reasonable space of symmetrical 



form. Again, when packed it must be safe against rolling, and 



be easily unpacked and mounted, and as easily dismounted 



Fig. i. 



-inl packed away a^.nn. I wi-hr.l tuitli. i to he ,ible t<> 



bsorption 



[Hid reagents, Fbe neo .1 special gas-anal 



room ui.l. U bri..ir in, nti..nrd 



use of a mercurial 1 1 - to be avoided. t ages 



ired by the pecul of packing, so that the cas 



