EVAPORATION OF SALT WATERS. 47 



' Tiiefirft, which had been tanned four years, broke with 1 10 

 Ibi?. when dry, and with 130 lbs. after having been fteeped in 

 water Si hours. ' 



The fecond, which had been tanned one year, broke 

 with 123 lbs. when dry, and with 140 lbs. after fleeping 2t 

 •hours. 



The third, or plain white, broke with 14S lbs, when dvy, 

 and with 'J!2'2 lbs. after iieeping 24- hours. 



X. 



- DefcHpiion of the Bavarian Method of evaporating Saline 

 Waters, i)^ il^. B o N N A R D , 



X HIS new method, pradtifed in Bavaria, bas been 'infro- Bavarian re- 

 duced into the fait work of Moyenvie, by M, Cleifs; rnfpeaor ^^^°^^ ^^^J^'^'?^ 

 of the falt-works of Bavaria. waters. 



The pans are compofed of fquare plates of caft iron, of 4 

 millimetres in thicknefs, and 4.76 centimetres on each fide, - 

 Thefe plates are joined by their edges, which are turned 

 downwards, and confequently without the pan : they are 

 folidiy united by a piece in the form a fquare gutter which 

 receives the edges, and is fecured by a great number of 

 Icrews, 



An evaporating houfe is compofed of fix pans, of this con- 

 flruclion, difpofed in two rows; but thefe pans have different 

 uies, which require a particular arrangement. 



That in tHe middle of the back row is the fmatleft ; it has 

 no particular fire-place, but it is heated by the jundion of the 

 chimnies from the other tire-places. The falt-water depofits 

 its impurities in it ; it is called the fmall pan. 



From the fmall pan the fait water partes into the graduating 

 pan, which is lower than the firft, and placed in the middle 

 of the front row; it is there kept in a ftate of conftant ebulli* 

 tion : the water is c-oncentrated in it to 20 degrees, and de- 

 pofits a part of Its fulphated lime. 



From the graduating pan the fait water pafTes into the pre- 

 paring pans, which are lower than it, and lituated at the two 

 extremities of the back row ; there it is alfo kapt confiantly 



boiling. 



