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THE MARINE REVIEW October, 270. Front View cent combined moisture which tains, it con- -and on which both freight and duty must be paid. This, together with the reduction in duty and an improve- ment in type of ship and in unloading appliances will doubtless field within which Cuban be used profitably. The installation of the new "Brown- hoist" rigs will naturally and inevitably lead to a selection in ships. Such has been the experience on the lakes and the preference given to ships of later extend ores the can Ss ea oO 5-0 -- k-/2!9'k- -- --------- --~- 96-9" Total Trolley Travel pe ES mere ee Or je ---- -1--_- --- 65-3" oe Yo | uh a RELY wi dt ee Weact | | MY | ; wt ' a | ' we f, 1 : i 4 O | | elk a ae ; iy | } \ int : : | Mt | | ! ! Ub 2 ' a i 7 WH yt +H it | ' 1 1 de De | Se Hh MK ia Mn | O} ee H Cot ae ee ae | =| | Clearance one yes u --o t 6 13410" Capacity of Hopper | 2Rope GrabBuchet Foto = bE fone Capacity 9 Tons | | | > 4 Clearance Line" of "----_ Hopber I oo Collector Wires = P MH Water Fic. 6--Suowince New Ric In ELevATION. designs, which contributed to fast work, has even led to extensive changes in others which were only three or four years out of their builders' hands. There are a few bulk freighters at sea, re- cently built, in which the lake design has been largely followed, and these occasionally find their way to the Dela- ware or Chesapeake and doubtless the saving in time which will be found to be effected by their use will lead to an increase in their number and this in turn to a reduction in freights. The Porhydrometer N the September issue of Tur Ma- RINE REVIEW a description was given of the porhydrometer, an Italian invention for weighing the cargo of ships which is attracting some attention abroad. A demonstra- tion of its efficiency was recently giv- en 'before a company of shipowners and shippers, both in London and Cardiff, which excited much comment. The Porhydrometer, literally meaning hydrostatic measure of weight, is the invention of Signor Emilio de Lo- renzi. Concerning the experiments 126-126 12'6" "| ML. Water > 001535 Side Elevation with this instrument the Shipping Gazette of London says: For three years Signor Lorenzi studied the question ere he was able to perfect his first model. The first sea-going steamer to be so equipped was the Procida, owned by the Navi- gazione Generale Italiana. When the first experiments were carried out, a load of exactly five tons was shot into the vessel, and the amount of immer- sion this gave on the aerometer was carefully noted. From this basis it was possible to work out the varying immersions for different weights of cargo. All the same, when 1,000 tons had been shot into the ship's hold the experiment was continued by loading another truck containing exactly five tons. It was seen that this five tons gave exactly the extra immersion as di¢ the first five tons and so on to the extent of the cargo. The Italian gov- ernment were so interested in the proposition that they decided to make