TY  - JOUR
T1  - A Description of a Vertical Floating Collimator; and an Account of Its Application to Astronomical Observations with a Circle and with a Zenith Telescope 
JF  - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843)
VL  - 2
SP  - 340
EP  - 342
PY  - 1815/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1815.0341
M3  - doi:10.1098/rspl.1815.0341
AU  - Kater, H.
ER  -