However that may be, I saw the snowcap on the planet Mars quite plain; and it is satisfactory to me so far.

With respect to the 8 3/16 inch glass, I am not quite satisfied with it yet; but I am making improvements, and I believe it will reward my labour in the end." Besides these instruments John Jones has an equatorial which is mounted on a tripod stand, made by himself.

It contains the right ascension, declination, and azimuth index, all neatly carved upon slate.

In his spectroscope he makes his prisms out of the skylights used in vessels.
These he grinds down to suit his purpose.

I have not been able to go into the complete detail of the manner in which he effects the grinding of his glasses.