INDEX 
TO  THE 
PHILOSOPHICAL  TEANSACTIONS 
FOR  THE  YEAR  1858. 
A. 
Annelids,  reproductive  organs  of  the,  93. 
Antimony,  on  the  properties  of  electro- deposited,  185. 
Arc  of  the  Meridian,  English,  787  (see  Clarke). 
Astronomical  vision,  improvement  of,  with  height,  477. 
B. 
Bakerian  Lecture.  On  the  Stratifications  and  Dark  Band  in  Electidcal  Discharges  as  observed  in 
Torricellian  Vacua,  1. 
Bate  (C.  Spence).  On  the  Development  of  Decapod  Crustacea,  589. 
Beer  (Professor).  Solution  of  Poisson^s  problem  relative  to  magnetic  induction  in  an  ellipsoid,  555. 
Blood-vessels,  structure  and  functions  of  the,  653. 
Boiler  flues,  resistance  of,  to  collapse,  389  (see  Pairbairn). 
Bowerbane  (Dr.  J.  S.).  On  the  Anatomy  and  Physiology  of  the  Spongiadse.  Part  I. — On  the  Spi- 
cula,  279. — The  spicula,  281;  spicula  of  the  skeleton,  286;  connecting  spicula,  289;  prehensile, 
291 ; defensive,  292 ; spicula  of  the  membranes,  296 ; tension  spicula,  297 ; retentive,  300 ; 
spicula  of  the  sarcode,  306;  spicula  of  the  gemmules,  314;  spicula,  the  positions  of  which  are 
unknown,  321. 
Brachiopoda,  on  the  organization  of  the,  791  (see  Hancock). 
Brain,  structure  of  the,  231  (see  Clarke). 
Buckton  (George  Bowoler).  On  the  Isolation  of  the  Radical,  Mercuric  Methyl,  163. — Decompositions 
of  Mercuric  Methyl,  166;  Mercuric  Ethyl,  168. 
6 B 2 
