PHOTOGRAPHIC GHOSTS. 269 



plate is used for receiving another picture, the original 

 image makes its reappearance, and as it is too faint to 

 be recognisable, a highly susceptible imagination may 

 readily transform it into the image of a departed friend. 

 The ' double ' is generated by the well-known property 

 of double refraction, obtained by a lens under certain 

 circumstances of unequal pressure, or sometimes by 

 inequalities in the process of annealing. So vanish two 

 ghosts which might have been more or less trouble- 

 some to those who are ready to see the supernatural 

 in commonplace phenomena. Will the time ever come 

 when no more such phantoms will remain to be 

 exorcised ? 



(From the Daily Nem, March 2, 1869.) 



THE OXFORD AND CAMBRIDGE ROWING STYLES. 



WHAIEVER opinion we may have of the result of the 

 approaching contest (1869), there can be no doubt 

 that this year, as in former years, there is a striking 

 dissimilarity between the rowing styles of the dark 

 blue and the light blue oarsmen. This dissimilarity 

 makes itself obvious whether we compare the two 

 boats as seen from the side, or when the line of sight 

 is directed along the length of either. Perhaps it is 

 in the latter aspect that an unpractised eye will most 

 readily detect the difference I am speaking of. 

 Watch the Cambridge boat approaching you from 

 some distance, or receding, and you will notice in the 



