Popular Science Monthhf 



381 



A 



■J 



Tethering the Largest of the 

 Super-Dreadnoughts 



TWV. illiislration represents the largest 

 aiulior ever made. It weighs 

 twenty thousand pounds. 



It is made of cast steel; that is, a 

 liquid steel poured in a mold of sand, 

 made from a pattern of wood similar in 

 shape to the anchor itself. The anchor 

 which had the distinction of being the 

 largest in tlie world previous to the 

 mai.ufacturc of the one illustrated here, 

 was one weighing eighteen thousand 

 five hundred pounds. 



The principal use to which this size 

 anchor is put is for anchoring the 

 largest super-dreadnoughts which the 

 United States Navy is now building. 

 The great battleship or super-dread- 

 nought "Pennsylvania," 

 recently piut into commission, 

 is equipped with such anchors. 

 Smaller anchors of the same 

 type are used widely on both 

 Government, foreign and mer- 

 chant vessels, the smallest 

 weighing two hundred pounds. 

 The smallest battleships and 

 cruisers have anchors weighing 

 usually from eight thousand 

 fi\'e hundred pounds to sixteen 

 thousand ri\-e hundred pounds 



each. 



The design of the anchor is 



simple. It is constructed on 



the ball and 



socket prin- 

 ciple with no 



pins to break 



or bend or 



drop out. 

 The Ihike, 



or main por- 

 tion, is in one 



solid piece 



and the 



shank has an 



end like a 



bail working 



in a socket. 

 Al a n \- 



anchors are 



hinged on a 



pin which 



rusts (ui t 



and fails to 



hold. 



A Hand-Made Hand-Played 

 Phonograph 



A KANSAS CITY man has invented 

 a "phonograph" which is operated 

 by hand and which may be built at a 



1 



jTfe. 



.5- 



A Phonograph Which 

 Requires No Expen- 

 sive Cabinet. It Will 

 Play Any of the 

 Standard Records 



The Anchor Is Constructed on the Principle of a Ball and 

 Socket, with the Fluke or Main Portion in One Piece 



cost of ten or 

 fifteen cents. On 

 this odd in- 

 strument, any 

 standard record is 

 placed upon a central 

 peg, the lower part of 

 which resolves itself 

 into a handle. A 

 revolving shaft is then placed upon 

 the center post above the record. 

 This shaft has at its outer end an 

 attachment which hclds the needle 

 firmly in the required position. 



Beyond the needle-holder isa weight. 

 A sheet of celluloid, parchment, or 

 even ordinar>' paper fastened to the 

 bar near the needle constitutes the 

 sounding-board of this unique con- 

 paper, however, will 

 refract a thinner 

 sound than will cellu- 

 loid. 



The "])honograph" 

 ^^ is operated 

 ^^ by a twist 

 of the wrist. 

 The weight 

 at the outer 

 end of the re- 

 volving; shaft 

 insures its 

 circular mo- 

 tion and the 

 needle, fol- 

 lowing the 

 grooves in 

 the record, 

 spirals its 

 way toward 

 the center of 

 the record. 



trivance. Th 



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