Am.  J.  Ph.] 
7 
■[Jan.,  1886 
JANENTZKY  &  WEBER, 
Manufacturers  and  Importers  of 
ARTISTS'  MATERIALS. 
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Paint  Boxes,  Mathematical  Instruments,  Drawing  and  Painting  Studies,  Eepousse'  Tools  and 
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ENGINEERS'  and  DRAUGHTSMEN'S  SUPPLIES. 
Manufacturers  of  FINE  LITHOGRAPHIC  COLORS  and  PRINTING  INKS, 
and  the  CELEBRATED  ANGLO-SWISS  VERMILION. 
No.  1125  Chestnut  St.,  Philadelphia. 
SCIENTIFIC  AMERICAN 
^  ESTABLISH  ED  '  i  846.  '  — 
The  most  popular  Weekly  newspaper  devoted 
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The  popularity  of  the  Scientific  American  is 
such  that  its  circulation  nearly  equals  that  of  all 
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year.  Discount  to  Clubs.  Sold  by  all  newsdealers. 
MXJNN  &  CO.,  Publishers.  No.  361Broadway,  N.  Y, 
A  wmt  rb  bkb  A  Munn  &  Co.  have 
ATpN  1  A  also  had  Thirty- 
■  Vj*  Eight  years' 
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I  the  Patent  Office  and  have  prepared 
more  than  One  Hundred  Thou- 
sand applications  for  patents  m  the 
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pared at  short  notice  and  on  reasonable  terms. 
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Address  MUNN  &  CO..  Office  SCIENTIFIC 
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M  ROYAL 
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