258  CONTRIBUTIONS    TO   ECONOMIC    GEOLOGY,  190G,  PART    T. 
suitable  for  brick,  since  they  appear  to  be  made  up  mostly  of  quartz 
grains.  There  is  an  unlimited  source  of  lime  in  the  Bangor  and 
Chickamauga  limestones,  described  in  the  paper  in  this  volume  enti 
tied  " Limestone  and  dolomite  in  the  Birmingham  district,  Alabama" 
(pp.  247-255). 
For  those  who  wish  more  detailed  information  on  the  subject  the 
following  references  are  given,  taken  mainly  from  Eckel's  book,  the 
first  in  the  list: 
Eckel,  E.  C,  Cements,  Limes,  and  Plasters,  L905,  pp.  L30-147. 
—  Lime  and  sarid-lime  brick :  Mineral   Resources  U.  S.  for  L905,  pp.  L003-1006. 
Gowdy,J.  K..  Sand  bricks  in  France :   U.  S.  Consular  Reports,  No.  L547,  January,  1903.  j 
Kitchell,  W.,  Lime-brick  manufacture:  Second  Ann.  Rept.  New  Jersey  Geol.  Sur-  » 
vey,  L856,  pp.  L07    108. 
M  \k-t  >n,  A . .  Tests  of  sand-lime  and  sand-cemenl  brick  and  concrete  building  blocks: 
Eng.  News.  vol.  51,  L904,  pp.  387  389. 
Mason,   1".   II..  Calcareous  brick  and  stone  manufacture  in  Germany:  Daily  U.  S.I 
I  onsular  Reports,  No.  L765,  October  3,  L903. 
Owen,  \Y..  Patenl  lime  and  sand  Meek:  Jour.  See.  ('hem.  Industry,  vol.  19,  L899,  p. 
117. 
Peppel,  S.  V..  The  manufacture  and  properties  of  artificial  sandstone:  Trans.  Am. 
Ceramic  Soc,  vol.  1.  L903;  Eng.  News,  vol.  49,  L903,  pp.  70  73. 
Further  contributions  to  the  man  niacin  re  of  arl  ificial  sandstone  or  sand  brick: 
Trans.  Am.  Ceramic  Soc,  vol.  5,  L903. 
Sand-lime  brick  industry:  Mineral  Resources  U.  S.  for  L903,  pp.  866-882. 
The  manufacture  of  artificial  sandstone  or  sand-lime  brick:   Bull.  Geol.  Survey 
of  Ohio,  nh  Ber.,  No.  5,  L905. 
This  is  probably  the  must  complete  original  treatise  <»n  the  subjed  published 
in  this  country.     It  brings  the  subject  down  to  January  I.  L905. 
Rochmanow,  .   Basic  fire-proof  bricks:  Thonindustrie  Zeitung,  vol.  27,  p.  108; 
abstract  in  Jour.  Soc.  Chem.  Endustry,  vol.  22,  L903,  p.  121. 
Schwarz,  Sand  bricks.   A-bstract   in  .hair.  Soc.  Chem.  [ndustry,  vol.  21,  L902, 
pp.  L183   L184. 
Wolff,  I..  C,  Bricks  of  lime  and  sand:  Thonindustrie  Zeitung,  vol.  23,  pp.  854-859; 
abstracl  in  Jour.  Soc.  Chem.  Industry,  vol.  L9,  L899,  j>.  18. 
Anon.,  The  Schwarz  drying  and  mixing  machine  for  manufacturing  lime-sand  brick: 
Eng.  News,  vol.  19,  L903,  p.  L79. 
