Indian Science and Technology in the Eighteenth Century: Some Contemporary European Accounts c10.25

c10.25

If the observer was furnished with a proper instrument, it would also be advisable to find the moon’s horizontal parallax in the manner first hinted by Digges and afterwards employed by Maskelyne at St Helena: This would in some respect answer the purpose of measuring a degree of the meridian, especially as the errors might be reduced to very small limits by a repetition of the observations; and this method has an advantage over that of measuring a degree, for it is not liable to be affected by the uncertain attraction of mountains.