trace the lines of any object that is selected or looked at, he will
find that, whilst he has been doing this, he has also made a drawing of
the subject upon the paper; for the pencil and the bead describe exactly
the same lines, though upon different planes. Thus, a drawing is made,
without even looking at the paper, but solely at the object.

_White Cats_.

In a recent number we quoted from _Loudon's Gardener's Magazine_, that
"white cats with blue eyes are always deaf," of which extraordinary fact
there is the following confirmation in the _Magazine of Natural
History_, No. 2, likewise conducted by Mr. Loudon:--"Some years ago a
white cat of the Persian kind (probably not a thorough-bred one)
procured from Lord Dudley's at Hindley, was kept in my family as a
favourite. The animal was a female, quite white, and perfectly deaf. She
produced, at various times, many litters of kittens, of which,
generally, some were quite white, others more or less mottled, tabby,
&c. But the extraordinary circumstance is, that of the offspring
produced at one and the same birth, such as, like the mother, were
entirely white, were, like her, invariably deaf; while those that had
the least speck of colour on their fur, as invariably possessed the
usual faculty of hearing--" _W. T. Bree, Allersley Rectory, near
Coventry_.

_Ultramarine_.

A French journal announces a discovery of the method of making
Ultramarine, by which means the public are supplied with the article at
one guinea per ounce, the colour having hitherto been sold from two
guineas to two pounds ten shillings per ounce.