Show submarine sub suit marine boat I 1 0 oi i friday afternoon about one mil mi alexandre I 1 made a public exam i mint it with his new submarine bont boat at se the navy yard B oaklyn to the entire satisfaction of all w wib io witnessed rt it amona the great number of spectators was abo commodore who g aap av the word to go down and come up mr alexandre with three other per persons went into the bat boat and about ten minutes after the nal vias was given the boat sunk to the del deshof de fifty teet feet w with th n no other communication with the surface but an electric telegraph and remained under the wa ter et for about a quarter of an how hour when notice was g eiven iven to rise by means of the telegraph in about three laree minutes afterwards atler wards the boat appeared suddenly on the surf ice of the water to the great delight and astonishment of all the spectators showing evi de denly delilly rilly that mr alexandre has perfect control over his ha vessel the Rub submarine marine boat fijn Is m shape an elongated ell li pw pie 39 30 feet in lent length rth a and 10 feet in diameter at its arrea reate fest transverse section and is wholly constructed of sheet iron connected by rivets and weighs about pounds without ballast and pounds with bal ballast falt on its sides there are numerous orifices filled with bulls eyes for the admission admi of light at the stern stem it is provida with a propeller and rudder by which the men in the interior interi oron ean propel and guide it w th af difficult difficulty IV ta tiie e interior inferior is a v ded into two separate compartments one ane occupying two wo firfilis of the vessel i which is called the cabin the other three fifths beier e el I 1 by two large re reier to which are attached attached two pairs of pumps either for air or water us tiie tae whole operation of the submarine beat depends upon th the dippl pi of a certain quantity of con denaer dens air air ant and in taking faking in or throw throwing ng off 01 a greater or less im b body y of water by means of the pumps in d descending descend andin in the water pimps are first caa called led into play to force into the water chamber a sufficient quantity of water so as to overcome the he equilibrium chic which h kapr the boit floating and to sink it after ar arriving riving i i i at the e hott bottom imn so emch of the condensed air in the reservoir reservoir is ad mittel into the cabin as to establish a 8 balance between the pre pressure wire of the water and that of the atmosphere thereby preventing the water of the arver from entering g hito the cabin when the two aw chwals at the bottom of the he vessel are opened tiie the equilibrium be bein anz esta established blishel the hatchways hatch ways are then opened and the soil sail is exposed to the wo workmen within athin who then ein cm operate either for mining rocel docte or fishing for pearls etc in re a just the amount of water requisite to sink the boat must be again expelled ath the same pumps when it will rise to the surface if it is desired to ascend more rap haply adly it will be sufficient to 0 o wok the bolt by which ifie the external ballast is thrown off when the boat ewt rises to the surface at the ved speed of ten feet a second A crew cort consisting of from three to six m men en can remain remain w without inconvenience in conven bence from four to seven hours under tinder water wi without th 0 ut i it im being necessary to ascend as the air wasch ch th tavy y br eitnie is purified by a pump which absorbs the carbonic acid gas gaa and evolves the 0 oxygen in a condit adit on OB favorable to the lung tais boat can be conveniently employed in ex exploring borim I 1 the he bottoms of rivers lakes aad harbors in 6 4 for pearls in in examining q unken sunken vessels in laying telegraph wire wire pc c |