The Sun.
London, England, 1847-01-19 00:00:00

N.. 16,953. LONDON, TUESDAY MORNING SUN JANUARY 19, 1847.

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-Second Edition A Popular and Practical Introduct lion to
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" This is the introduction to law studies. -In this most imps rtant
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" No one abobt, to adopt the bar as a profession ought to be ' Oth-
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the law turvieWed in a diagram : Mr. Warren instructs the str Silent
In these principles of the law as deVeloped in ft actice, amidst the 'end-
lessly varying dreutnstances of daily life."—Monting Herald.
" There can be no question that this is beyond all measure the t;best
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and technical knowledge of all the' several departments of the pro-
fession, civil, criminal, and ecclesiastical."—Legal Observer.
"The most cOmplete BeOnning Book' that was ever put into i the
'hands of a young person seeking or World* a profession."—Bl ac k-
-wood's Magazine.

- "rt 13 sensible and practical, as well as eicAuent-and elegant ; mid
the number and beauty of the quotations with which it is stud (tied
give it an additional value, and, combined wish its other recomn let 1.-
datiobs, make it by far the best work of its Lind ever yet offerer 1 to
the profession."—Law Times.
" The bOok is one which no young it an can rise from the pei ttt sal
of without feeling his energies braced, his principles conSrmed, ;land
his **holt Inind elevated -The Tines.
A. Maxwell and Son, 32, Bell-yard, Lincoln's Inn. '

IQtROCKEDON'S PATENT PURE PLUM-
'BAGo for ARTISTS, and ENGINEERS' BLACK LEAD

. .
The 'perfeCtion to whieb.this article is-now brought, In Colottr, firm-
ness, entire Purity from Grit, aad ready Erasure, is fully shown in the
accompanying Testjmonials -from Painters and Engravers, Archi-
tects, Engineers, and other Draughtsmen, who are at once the most
competent judges, and men of the greatest eminence in their several
profession's. -'sl'othing is .required to be added to this mass of evi-
derce; but to point out to Pencil Manufacturers the peculiar advan-
tages presented bytjte form of the blocks of •this Patent Plumbago,
lot-ready application and the avoidance of waste.
Each of the blocks weighs about seven ounces, and they are to be
Used by the pencil-makers for such different qualities of pencils as
are known by the centre letters stamped on the blocks. These
blocks being already tempered for such degrees of hardness and
colour as-the letters indicate, cannot be made banter, or treated In
any way to make them harder, without injury to their quality. 'The
blocks are thus ready for immediate use, of all degrees of colour and
hardness, and possess great advantages, in the uniform quality in
the letter, and in the size of the block, -which, being two inches and a
quarter square, and about one inch thick, enables the maker to have
but one joint in each pencil.

approach ; and this is withoutthe risk of snapping' oef the point, which.
is the torment, of all others, the most vexatious : has never.olide
happened tome with yours, and,l have used one of the* HIM nearly a
month There is no affectation in declaring that lam cti_seplYgrateful
for your discovery, and though latein making this acknowl,Vgment to
you, I have lost no opportunity meanwhile In endeavouring` to make
the great qualities r f your pencils as popular as they deserve t i be.—
I am, my dear Sir, yours always truly, '
W. BroCkedon, Esq WILLIAM HARVEY.'
From Professor Brande, F.R.S.. &c. &c. &c.
Royal Mint, Feb. 13, 1846.
illy dear Sir—My opinion respecting your Patent Plumbago
amounts to this ; that by much ingenuity you have overcome nume-
rous difficulties, in the way of compressing comminuted plumbago
into a solid mass of an extraordinary, homogeneous, and uniforift •
character ; that the fracture and texture of that which you have so
consolidated so closely resemble+ the finest native specimens as to
render it extremely difficult, if not impossible, to distinguish- be;
tween your artificial product and that of the finest quality obtained .
from the mines; that the pencils from your manufacture are, as far
as my judgment enables me to determine, equal to those made of
the best Borrodale plumbago ; and, lastly, that you have succeeded
in giving to them those different degrees of hardness which are re-
quired by the artist, without rendering them brittle on the one hind,
or pulverulent on the other.—Yours always, very sincerely,
Wm. Brockedon, Esq. WM. THOS. BRANDE.
From Francis Ronalds, Esq., F.R.S., &c., of the Kew Observatory.
" Kew Observatory, Monday. •
•My dear Sir,—l beg your pardon for having so long delayed to
express my opinion of your patent lead In pencils ; but I do not
regret very much the omission, because it has given me time to test
the specimens fairly whilst making my drawings for the report con-
.
eerning this Observatory to the British Association.

I may conscientiously say that I never used a pencil—l speak of
the 1111 at this moment—with more satisfaction. It was smooth,
equally hard throughout, and possessed a quality which the harder
sort of pencils hitherto used are deficient in, viz., blackness.
Before I had tried them all, Baron de Walterhansen and Professor
Kriel, of Prague, came here, and were so enamoured of them that
they not only took them per force, but almost abused me for not
being a le to give them a nearer address than Cheapsido or the City-
road, for procuring a stock to take home. I will thank you to put
me in the way of giving better directions in future.

FRANCIS ZINALDS.

Yours very sincerely,
William Brockedon, tag.
From Major-General Colby, R.E., F.R.S., B:c., 84, of tl •
Ordnance Survey. .
_ _

Ordnance Map•oifice, Sou-thampton, Jan 24, 1846.
My dear Sir,—lu reply to your letter of yesterdsty's date, I have
much pleasure in being able to state that the specimens of pencil%
which accompany it are
_of a very good quality and quite free from
grit.—Tours very truly, THOS. COLBY.

• •
Prom Charles G. Lewis, Esq., Engraver.
My dear Sir,—l have only just now commenced using the pencils
you were so kind to send to Ere ; they are the best I have ever used,
so very free from grit ; they are just the thing for the use I am now
making of them, viz., reducing. The Hit is quite delightful to draw
with, and a great relief after the many gritty pencils I have been in
the habit of using, and which break incessantly. I regret that I had
non earlier an opportunity of giving them a fair trial.
Believe me, dear Sir, yours very faithfully,
Wm. Brockodon, Esq. CHAS. G. LEWIS.
From Mr. Roberson, Attists' Colourman, Long Acre.

51, Long Acre, An. 10, 1846.
Dear Sir,—All who have had to contend with the faultineps of
genuine Cumberland lead for some years past, in the manufacture of.
lead pencils, ought, as well as the artist who uses them, to be obliged
to you for the riddance of those faults by your new method of pre-
paring lead. The samples that I have tried fully warrant me in say-
ing that the Arts are now independent of the natural production,
Cumberland lead.—l remain, my dear Sir, yours very sincerely,

CHARLES -ROBERSbN.

W. Brockedon, Esq.
From J. T. Willimore, Esq., A.E.
23, Polygon, Jan. 1846.
My dear Sir,—l have tried your pencils both for tracing and reduc-
ing, and find them every thing that can be rewired ; they work
freely, and, what is very desirable, they seem quite from grit, vk hich
is not the case with pencils generally; they also leave a clear and
excellent transfer upon the etching ground.—l remain, dear
yours faithfully,
To W. Brockedon, Esq

JAS. T. WILL3IOItE.

From Mr. Edward Duncan.
2, Mornington-place, May 11, 1846.
My dear Sir,—l have great pleasure in adding mine to the many
favourable testimonials you have received of the great superiority of
the black lead manufactured by your patent process. I have tried
the specimens of pencils you were so kind as to 'send me, and I have
no hesitation in stating that, in my opinion, they possess every
.quality, in a superior degree, that the artist can require.
Believe me, my dear sir, yours very truly,
To William Brockedon, Esq , F.R.S. E. DUNCAN.
Extract from "Ele•nents of Art," by J. D. Harding, Esq., p. 94.

Third Edition.
"Recently the quality of lead pencils, both for purposes of art and
for general use, has been greatly improved,in consequence ofthe dis-
covery, made by my friend Mr. Brockedon, of the mode of preparing
pure plumbago. For years no fresh lead has been obtained from the
Cumberland trines, and the last having been exhausted long ago,
lead p'•nclls were getting every day worse, and insufferable from grit.
To remedy this, composition pencils have been manufactured ; but
these possess no lustre or depth of colour, and it is difficult, some-
times impossible, to efface their markings. By Mr. Brockedon's
invention we obtain the pure black lead in all its lustre and depth of
colour, without a p article of grit, and of any degree of hardness or
softness ; and the markings from are all easily effaced. So great is
the improvementin all respects, even over the pure plumbago in its
native state, that i t may truly be said that until now a perfect lead
pencil has been unknown. Lead pencils from Mr. Brockedon's
Pure Plumbago are now manufactured by Messrs. Morden and Co ,
and by Messrs. Winsor and Newton."
Extract from an Address delivered at the Anniversary Meeting of
the Geological Society of London, 1846, by Leonard Homer,
V.P.R.S., President of the Society.
" Every year has disclosed new facts in confirmation of the theory,
that accumulations of detrital matter were transformed into their pre
sent condition mainly by the action of heat, accompanied by other che-
mical actions, and the powerful agency of steam and elastic forces
under enormous pressure. A very ingenious process, invented by
Mr. Brokedon, described in a short paper read before us last year,
by which he converts, under very powerful pressure, the powder of
graphite into a solid mass having a conchoidal fracture, and undistin-
guishable from the most compact native b'ack lead, shows that pres-
sure alone may convert fine detrital matter into solid stone.
" 29, Devonshire-street, Queen-square, Bloomsbury."