}  Minutes  of  the  Pharmaceutical  Meeting. 
635 
with  but  little  exertion.  Under  this  pressure  the  air  is  driven  through  the  minute 
opening  in  the  blow-pipe  nipple  with  great  force.  The  blow-pipe  may  be  used 
effectively  with  a  gas,  alcohol  or  oil  flame,  also  for  creating  a  draft  in  the  use  of 
charcoal  or  coke  in  connection  with  the  small  smelting  furnaces  now  so  largely  in 
use.  Fig.  3  represents  a  compound  bench  blow-pipe,  which  possesses  a  rocking 
motion,  enabling  the  flame  to  be  used  in  any  position. 
Mr.  Shinn  exhibited  specimens  of  Sluebracho  bark,  both  dark  and  white,  which  is 
recommended  for  asthmatic  affections;  it  is  quite  astringent,  and  is  used  in  Soutii 
America  for  tanning  leather. 
Professor  Maisch  exhibited  a  specimen  of  very  handsome  senega  root,  which  he 
presented  to  the  cabinet  of  the  college  ;  this  specimen  was  peculiar  in  having  very 
long  and  rather  thin  branches  of  much  brighter  appearance  than  usual.  He  also 
exhibited  a  specimen  of  a  root  which  appears  to  be  largely  sold  for  senega  while 
doubtless  a  product  of  a  polygala,  it  was  wanting  that  peculiar  carinated  line 'which 
distinguishes  the  senega  so  completely  from  other  roots,  and  has  a  central  wood 
which,  in  all  parts,  is  nearly  circular  upon  transverse  section. 
Professor  Maisch  presented  a  piece  of  lead  pipe  which  had  been  connected  for 
nearly  ten  years  with  a  circulating  boiler  in  a  dwelling  in  this  city.    The  pipe  could 
