Thus, not merely what it can do, but the rate at which it can do it, has to be considered in estimating the value of photography as an ally in astronomy.
p. 33. - The System of the Stars (1890)
Thus, not merely what it can do, but the rate at which it can do it, has to be considered in estimating the value of photography as an ally in astronomy.
p. 33. - The System of the Stars (1890)