ay ee ao ps 
, 
- Working Outfits.” 183 
CopPreR ORES. 
De OTCCIMODS (326 oe oe en oinelein sn ebro $ 3.00 
MIN INIOTIS® ° wininiGgiee oss 6s onde rue sen 6.00 
Tron ORES AND MINERALS. 
BOLSPECIMONS’ . ce... esc ee cele gees, 6.00 
DUTRPOCUNCDS 2 54 0. os ea le Sepad ed's Kelas 10.00 
LEAD ORES AND MINERALS. 
SOCOM S| iihicps, os oe se Hic'o ow We a tire $ 3.00 
MRP CATIIOIIG 55 94- ortisie 55s’ ove sie 8 wit 8h aiale 6.50 
BREE IPOCATIACNIS: Gig Seay oie so oe act Awe s Wee 25.00 
Zinc Ores AND MINERALS. 
MU EMMIROCE Sc occcg Sante 4 «Gale als oie Waneare ate $ 400 
MMNOESINGHIS 1 (sce aaicle e's 6 + sida o e.w ew tareaterets 10.00 
CrysTAL MopEts, PRESTON’s, OF CELLULOID. 
A new and most excellent invention is Pres- 
ton’s set of six crystal models. They are 
made of transparent celluloid and aver- 
age 4 inches longest diameter. They ex- 
hibit the six different systems of crys- 
tallization, and show various derivative 
forms by means of internal crystals, also 
of celluloid. The axes of the crystals are 
shown by various colored silk threads, the 
same axis by the same color, different 
axes by different colors. Set of six in well 
ROM ORR stip Age. S55 oa v0, 5 siaicale olpesieres $16.00 
CrystaL Mopets, or Harp Woop. 
34 models, with reference list, in box... .$10.00 
50 models, with reference list, in box..... 15.00 
108 models, with reference list, in box..... 24.00 
CrystaAL MopeEts, oF Gass. 
21 cut glass models, showing the crystallo- 
graphic forms and natural colors, of un- 
CAE OINA SIVGORBE «7s, oo «Ste acest e es $18.00 
CrysTAL MODELS IN PLASTER. 
WRC WV TEDEOs WIOCOIS Wa os so 5 od kis ls are wlacald noe . $16.00 
50 colored faced models, mounted in brass 
holders and again on hard wood blocks, 
