
          cast their shad[crossed out: d]ows a long-way before

I mentioned to you that I had attended
a part of a popular course by Dr Faraday
on Earth Air Fire and Water My notes on
these lectures are very scanty and I can therefore
only give you some of the general heads -

He gave the size of the earth relative to the
Sun and Planets - Illustrated the relative
magnitudes of sun and earth by a small ball
for the latter and the dome of St Paul for
the former - Explained the methods of weighing
the earth - stated that the crust is found
principally of but 3 substances Sine Silex
and Aluminum - Geologists not yet agreed on
the condition of the interior - probably in a state
of incandesences - proof of the position All that
is positively known relates to the exterior or
to a thickness of about 100 miles considering the
dip of the strata. A large sectional drawing
was exhibited the same since published in Bucklands
Budge water treatise - Exhibited the three earths
above mentioned - very different substances although
to the eye they appear the same all white - showed
their different properties - solubility etc. etc. also
illustrated the composition of these earths by burning the
[metalic?] [?] a variety of experiments were
exhibited with large quantities of the materials

[left margin]
of any articles I wish to send to London unless it be a small package for 
Mr Macintosh the Indian rubber manufacturer. I sent a package a
        