The Artizan . of sailing vessels built since 1S50 by the same gentleman onthe shipyards of San Marco and in Muggoir, opposite Trieste, surpasses forty,varying in their carrying capacities between 300 and 2,000 tons. The Austrian shipbuilders had, until now, only an opportunity of excelling inthe construction of wooden vessels; bnt lately a start has also been made inthe way of iron shipbulding; and as they now have also at their disposal atlow price a Bessemer steel from Styria and Carinthia, which can only beequalled in quality, but not surpassed, by the best Swedish and Russian steel,it is e
The Artizan . of sailing vessels built since 1S50 by the same gentleman onthe shipyards of San Marco and in Muggoir, opposite Trieste, surpasses forty,varying in their carrying capacities between 300 and 2,000 tons. The Austrian shipbuilders had, until now, only an opportunity of excelling inthe construction of wooden vessels; bnt lately a start has also been made inthe way of iron shipbulding; and as they now have also at their disposal atlow price a Bessemer steel from Styria and Carinthia, which can only beequalled in quality, but not surpassed, by the best Swedish and Russian steel,it is expected that Trieste will become a well-suited locality for steel shipbuildingenterprises. Hen- von Tonello is about to form a company for the purpose ofadding this branch of trade to his building business of San Marco. ROSENBLADS INSTRUMENT FOR TRISECTING Rosenblad, of New York, and now residing in London, has sub-mitted to us the instrument which we have the pleasure to illustrate and des- FlG : I. cribehere, in the hope that its use may be found to facilitate the labours ofsome of our readers. Referring to the illustrations, b e g is an equilateraltriangle, divided in two equal parts, tfyfff, and n volving round tlie centre of the semicircle; the rod < \ mpanin the Cs ! G : Z. movements of the triangle, by means of tin: pivots e and h. To use the instrument, If A I! C be the angle, put the centre // on the frivol I!, anil let a h coverA B; a b O 18 linn tie angle to be divided. Adjustthe triangle b * g so thai the three lines/y, eh,and b c, cross each other in one point, ,i. The angleA— 1j b e h is now equal to c h e, bin b e // ? hi <, there- fore c eb= l h e; now a h e — 2 b h e, therefore a I e *• 2 c h e. Asc h g - ) of bothanglcs, and <? I, e \ of h I, a, <? I, ,/ must be equal bo of aI, h. If we, therefore, let the instrument levolve round its centre tillb h covers be, and let the other leg of the angle a be be crossed in onepoint by the li
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
