Methods  of   Connecting    up   Primary  and
f  ~^        -^     Secondary  Batteries,  and  Systems  of  Wiring
^       S     USED.  —  Primary    and    secondary    cells    may    be
f^        S     connected  in  series,  in  parallel   (or  multiple)  and
^^         I      in   multiple-series.     The   meaning  of  these  terms
^^        M     is   explained   in   Fig.    13-23.     For  series   connec-
\_J        S     tions,  Fig.   13-23a,  each  positive  element  of  one
cell  is  connected  to  the  negative  element  of  the
next,  leaving    free    the    negative   element  say  of
the    first    cell    and    the    positive    element    of   the
last    for   connection   to   the    outside    circuit.     In
the   second    or    multiple    method    of   connection.
Fig.  13-23&,  all  the  like  elements  of  the  cell  are
connected  together.     Fig.  13-23c  finally  shows  six
cells  in  multiple  series,  i.e.,  three  each   are   con-
nected in  series,  and  these  two  sets   in   multiple
'  or   parallel.     To    compute   the    voltage    and   am-

perage that  each  one  of  these   combinations  will  furnish  to  the
outside  circuit,  let

iV  =  number  of  cells  in  the  combination
V  =  voltage  of  one  cell,  and
A  =  amperage  of  one  cell.
=4

1—1

6


GAS  ENGINE  AUXILIARIES  421

Then  the  following  formulie  will  give  the  desired  information:


Kind  of  Combinatioa

Series

Multiple

Multiple- series

Voltage  of  set

AniDpraere  of  set        .  .    ..
