Pliotogranlid are now (aken very Buccessfully by the a:d of the new magnesium liglit. Fifteen grains n the forin of stnall wire will burn a minute, and nol oost moro than a few cents. At the distance of eight foet from the sitter, the light, produces a negative oqual to any obtained from sunüght under tlie most favorable circumstances, and by nioving the light, the harshness of the shadows aud a distribution of light and 8hade are oom plet ely at the control of the opera; or. This o,pens a new pago in photograpby. L3" Mr. Goooh hos writteo to the War Department from Cairn that the aNtged butcberÏM'of oolored troopa at Fort Pillnw are fully proved, ind that tho f:icta are wotso than were at first repi.rted Mr. Gt. s CbirmaD (.f the rlinise Commitieo on tiie Conduct of thti War. Th Prewdewt waite for the report of the sabcommittee. He will aot when it is ubmiUed to Congrega.