64 



YEASBOOK, public museum, MILWAUKEE. 



[Vol. I. 



seen in figure 36. Most of the sulphur leaves hy rail, Ixit a considerable 

 portion is conveyed to New York in boats belonging to the company's 

 fleet. 



Fig. 3o. — Loading sulpliur. Frccport. Brazoria County, 

 Texas. 



This process is a continuous one and wells when once started are not 

 allowed to cool off until the sulphur ceases to flow, when they are aban- 

 doned. When the operation first l^egan the life of the wells was con- 

 sidera])le ; the record production being three months, but as the removal 

 of the sulphur continues the wells, as a rule, become shorter-lived. When 

 the steam was first introduced into the mound it took several weeks to 

 heat the ground sufficiently to start the process. The continued intro- 

 duction of live steam and compressed air into the rock has created so 



