TY  - JOUR
T1  - On Certain Improvements on Photographic Processes Described in a Former Communication, and on the Parathermic Rays of the Solar Spectrum
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 133
SP  - 1
EP  - 6
PY  - 1843/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1843.0002
M3  - doi:10.1098/rstl.1843.0002
AU  - Herschel, J.
ER  -