μ2 Boötis. 0″·5 : 8, 8·5.
ιa Boötis. 0″·5 : 4·5, 4·5.
7 Tauri. 0″·5 : 6, 6·5.
108 Draconis. 0″·5 : 9, 9.
η Herculis. 0″·3 : 3, 8.
42 Comæ Berenices. 0″·3 : 4·5, 5.
ω Leonis. 0″·3 : 6·5, 7·5.
Since writing the first edition of my catalogue, the writer has received many gratifying accounts of the success of the “Silvered-Glass Reflector.” Many private letters have been received by him from observers, expressing their delight and satisfaction. This has been so encouraging that no pains have been spared, nor any opportunities neglected, in turning to the best purpose every valuable lesson that continued practice and experience may have suggested in the manipulation of specula from time to time, in order to secure the best means for obtaining the highest excellence of defining power.
Many modifications and improvements have been made in working and testing mirrors, and special machinery and appliances constructed for large sizes. But to complete my conditions suitable for truly figuring and testing specula of considerable size, I found it necessary to remove from the traffic and tremor of a town to a still and tranquil situation in the country.