1825.) 
_oo General BentHAm appears’ tordeserve the 
honouriof having)-fitst proposed sa! floating 
breakwater, tobecomposediof separate floats 
of. woods,“ of a triangular;:or rather ‘aprist 
matie 5°? to;beusedrin’ protecting Ply- 
jneuthherbour,.at-the estimated first'cost 
-of;,£201,026. oAind, several) years» after+ 
awards, Mr3\Davip-Gorpon included ‘in his 
Specification.of aipatent, dated 14th January 
4$22,; the | descriptionsof what ‘he calls 
\f imprayements>on floating’ breakwaters';” 
-but,ef his intention to!do so; the title of ‘his 
-patents ‘for additions-to:steam-packets and 
,etherwessels,’? had,-we submit, given no 
-suflicgient, notice, to the crown or to the 
PUblise® to Isnvs0l y 
y2 Nhore;than.asyear ago, Mr. White put 
-himself.to theexpense of constructing three 
\Zafts, such as we have described above, and 
of.so, securely mooring them, near to the 
dock-yardjjin, Dover Bay, in Kent, that 
during the, heayy,gales of wind, and some 
tremendous seas since experienced, they 
haye held fast at their stations, and had 
“the effect of breaking the seas, and caus- 
ing smooth water for a considerable space 
to leeward’? of ‘them; .ds is attested by the 
signatures of three pilots and two, naval 
captains employed on that coast, in the 
Repertory, before quoted: wherein, also, 
Mr, White; remarks;::that effective floating 
breakwaters may beerected in.any situation, 
at one-twentieth, part:,of the: expense of 
\stone, erections 5, that:such, will act in any 
»state,of jthe.tide,;) and are capable of being 
Femoved.to-other situations, in cases where, 
uring; Wwars,.too,much facility might be 
#iven (by; them, towards. the landing of an 
tile-army.pio 
10 guitous 1209 
Zo Cuartes Macxinrosu, of Crossbasket, in 
powbanarkshire »\for preparing « Water-proof 
ng ind,,dinstight Fabric of Hemp, Flax, 
Saree? TUT UTTITT Eikkt Ort oo Core” 
“%* Se our remarks on this subject, in the second 
Lédlumn of pf. 244, and the note in p. 242 of this 
wolunie, Ifjaswe have suggested, the newly enrolled 
pecifications were examiyed by some Competent 
Bofahit ‘and the titles of what each patentee has 
Wdeseribed “ind claimed (for frequently several, and 
pile very iucongruous matters, often are includedin 
as 
€ same specification) were made oul, as concisely 
intelligibiity would admit, for publication in the 
Aéudem (Garette;imost usefal information’ would 
E Siven to, ingenious persons, whose atten- 
turned to.the making of improvements, 
Lo! 
ied 
eqablidlal large. At present, such persons 
« pand persiiones! npn ip, to study, only 
‘asma rhs . whole number of specifications 
epg A Feniia with enpritiige Yelp ‘their 
Grawingsy printed ithe ‘* Repertory of Arts,” at 
very. irpegular, periods after their enrolment, and 
VDL ee 
S metimes 50 protracted, that the patents haye first 
= BEMIS Mary es : 
‘ A 
c; 
‘ 
rcelse, Within ahecperiod of two years from the 
of enro) ep _an, abstract or condensed ac- 
t,dcerompan by reduced engravings of essen- 
‘Idiak particulars only, may be tead by such persons, 
P ahs fpadend phiartal” dais ike fins 
much. correspondence. betwe the ales o| 
GedidthantiaAd tle diier UF pauticatios thiron. 
Whe; public, eameeg = mach, oriedene ya 
9 and. official information. of, the, precise sub- 
‘Jet i ppb ay oe granted by 
tlie Of6Wh, and’ completed by the ‘specifications, 
aia vent bilesi by: the patentcer> as alsoofithe 
_ place of en CNL, ACH CASE por lay 
8) PAVUUIA hoe tenke leona be ft et for Gonstract- 
Thg these talts? — Sey p.438-0f this volume.) 
mone 
Patents for Mechanical.and Chemical Inventions. 
533 
LOW pol, Cotton; DLeather, or Paper, &e.— 
STR Fine VEZ Vos ees iy os 
on The principle 6f iriveritiot Here” eénsists 
inouniting torether tw6 thicknesses of the 
piven’ fabric, with a! filmi’ OF “cadutehouc 
varnish between them! ® 9!) Sasol toi90% 
V/The*Endia rubber ‘to be! used Gn the 
patent’ process; ‘isi to be ett, or shaveasinte 
very thin shreds, and “abdut ‘twelve “otihiées 
of it steeped in aboutd Pill of GOalsbilor 
artificial naptha, distilled from \the® tar of 
the gas-works, ina yessel.,surrounded\ by 
steam, for, promoting the, melting_of;,the 
elastic gum, into.a thiek,varnish ;; which 
latter is to be strained through'awwirej\or 
horse-hair, sieve.)> 9.490 Fria “191 
Two pieces. of the fabric, to\-be_used, 
whether of cloth, silk, &e., .are/now to be 
cut to the same size; and each-.one stretehed 
flat out/on a frame; and then; by means of 
a brush, some of the, elastic. varnishiis; to 
be: spread evenly over, one of the surfaces of 
each of the.strained fabries; so,as completely 
to cover the same ; and the frames are then 
to-be'set by, in a dry place free from dust, 
until the varnish has,.set; -andcy become 
sticky ; when the two varnished ‘surfaces 
are to/be applied to each other, and both of 
them detached from the frames, 
In order to complete the adhesion of the 
two fabrics into: one, they should le 'passed 
between plain - rollers;» moderately pressed 
together, and. afterwards ‘thoroughly dried 
in a warm room. The fabric thus prepared 
will be found not at all lidble to‘part ‘again, 
to be very flexible,'and quite impérvVious to 
water or air, and maybe made up into light 
outer garments, or applied in’ anyother 
way. D OF" 
To Joun Ranxty, of New Bond’ street; Mid- 
dlesex; for an Alarum in case of Robbery of 
Valuable Property, from Coaches and other 
Carriages. —I1st’ Nov. 1823. fe. Sa eee 
The principle of! this invention’ consists 
_in affixing, withinside of the strong box, or 
seat of a coach or other carriage; destined 
for the carrying of bankers” parcels, or other 
smal] things of great value, an ‘alarum-bell 
and a notice-latch so‘contrived; ‘that on 
the opening of the lid of the box or seat, 
whether by means’ of ‘a false’ key, or by 
forcing open the same, the bell ‘shall be 
rung, and give ‘an alarm. NO 
The bell to be ‘used, is Such’an ‘one as is 
used for a table-clock, and ‘is’ to be fast 
screwed by! its crown’ to‘a’ square’ metal 
plate, affixed to the’ side, ‘or’ end, of the 
strong box, near to the lock: thereof: to 
“which plate is'also to;be ‘affixed a’ strong 
curved spring, “provided witha lump ‘of 
metal, to act’as a hammer ‘on’ the edge of 
‘the bell; and’ the’end of whieh spring must 
project ‘about ‘an! inch* beyond the ‘edge ‘of 
the bell; and there be bevelled on the wndér 
side, like to a spring-lateh* 99) SovoTs: 
» Over: the bell'and spring, ’a metal easing 
is to be fixed; provided witha mortice,’ for 
letting out*the Vevelled’ end Of the spring, 
and 
