TY  - GEN
T1  - Remarks on the Hadley's quadrant,tending principally To remove the Difficulties which have hitherto attended the Use of the Back-Observation, and To obviate the Errors that might arise from a Want of Parallelism in the two Surfaces of the Index-Glass. By Nevil Maskelyne, F.R.S. Astronomer Royal.
DA  - M.DCC.LXXII. [1772] 
CY  - London :
AU  - Maskelyne, Nevil,
PB  - printed by W. Bowyer and J. Nichols,
PP  - London :
PY  - M.DCC.LXXII. [1772] 
N1  - A lecture read to the Royal Society on May 28, 1772.
N1  - Reproduction of original from British Library.
ID  - 591741
KW  - Quadrant
KW  - Navigation
KW  - Quadrants (Astronomical instruments)
TI  - Remarks on the Hadley's quadrant,tending principally To remove the Difficulties which have hitherto attended the Use of the Back-Observation, and To obviate the Errors that might arise from a Want of Parallelism in the two Surfaces of the Index-Glass. By Nevil Maskelyne, F.R.S. Astronomer Royal.
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ER  -