BULL. GEOL. SOC. AM. 



VOL. 11, 1899, PL. 49 



Figure 1. — Floor of mixed Laumontite and Stilbite 



Floor is composed of layer of Laumontite, % inch thick, isolated Analcite crystals and 

 layer of Thomsonite of Type II, % inch thick. One-third natural size 



Figure 2. — Drawing of Crystal of Chabazite 



FLOOR OF LAUMONTITE AND STILBITE AND DRAWING OF CHABAZITE CRYSTAL 



