PATENTS AND INY KNTloNS. 



and the wire game. Of course a neat*r and 



workmanlike arrangement will occur to 



any <MM with mechanical MIL.-, nun \. but the 

 principle to merely to have an op, t. 

 me the entire wj.lt h ,.f ih, \x n, upper 



part of Ibr fvnvn. It i- e\idcnt that it is pos- 

 frfrfr fop flic* to enter the room through this 

 opening, which it on at, but 



tJtfewtha! dl lind'thcir way inwartl I 

 very email proport ion t<> the larger Dumber thai 



bMftrtHUU second I he niM-nt..^ intention. 



tin- inventor, attaches no conditions 



safe to con- 



efaoethai it* u i- ";'" '" a11 - 



Rapid transit is oiu> of the vital M ue-iion- 

 of thr dar. not only in the large cities but for 

 loo* distances as well. The ncees-ary ...n.ii- 

 - :;. . > n an i high ratei of ipead 

 -licate that for 2 through h 

 stra m must be laid. With 



* at is contemplated. H roust 



__ very objectionable, owing to the almost irre 

 ststiblc lateral pressure. Experiment in the 

 direct ,-le-rail roads have been in prog- 



rw during the past year. A road of this de- 

 scription has been constructed across Long Is- 

 land, and an experimental section has been in 



* operation for some months. 



r device in this same direction is the 

 Cnase-Kir.-lin.T Acrodromic Kailmad. A Ml 

 the other road. : ' the cars are sharp 



like the bows of a ship, so as to offer t h 

 resistance to the air. In this road. h<> 

 a novel feature is intr.-duced in a set of aero- 

 planes, readily adjustable, and intended to aid 

 in overcoming the grades that may be encoun- 

 tered along the line. Elaborate experiments by 

 Maxim, Langley, and others ha\. proved that 

 the most effective aeroplanes are short in the 

 direction of motion that is to say, like a bird's 

 edgewise.. A set of Vein t ian win- 

 ires a good idea of the arrangement 

 of these aeroplanes; they are supported on 

 strong framework above the care, and can be 

 delicately adjusted to any angle. On both these 

 roads a rery high rate of speed is anticipated, 

 150 miles an hour being claimed as possible, 

 while 100 miles an hour is confidently hoped 

 for. To attain such speed with safety, curves 

 most be abolished : Bid -in-e there must be no 

 as are inseparable from grade 



nd the like, the track must be ele- 

 vated. The tingle-rail system of course greatly 

 simplifies the engineering problem, does away 

 with the necessity of snow sheds and the like. 

 aad reduces the expense of right of way to a 

 minimum. On a level the afiroplanes will be 

 kef* practically straight, and an ingenious me- 

 chanical device is arranged so that the lifting 

 effect will increase or decrease automatically 

 according to the steepness of the gn> 

 TUi the electric trolley roust give way to 

 -I storage batteries is nerally ad- 

 mitted bv electrical engineers. Conduit svs- 

 tHM are (n mxmtnl operation in Washington, 

 ..". f4ergroaiid electric srstem has been 

 gu.li. fully teUd in the B/da-Pesth street 

 ^ ch run in all directions through 

 TTwwp, aooording to the " lUilway 

 hav been in operation several years, 

 and their snoot* from an engineering as well as 



from a financial point <>f \ii-w is a^mv.l. This 

 lx bclirved to IK- at present the i-nly tianiu 

 Kiirope that is successfully cperat'ed |.\ 

 of an underground conduit The 

 system as reganN |.vHi,|y f ; ,i a l shocks 



M and the like is >;iid t., > f,,||y 

 lieiimiisi rated in praet !<.-. 



All : I'lliienl is rel" 



.pany <.f S A In, I, 



CMii-'rurtcd a ., Jly for the pi,- 



space for the batteries being provided under the 



Seats, accessible thr. -ugh openings ;it the I. 

 the . , that of \ 



L. Silvey. of Dayton, Ohio, and the aim of the 

 . ..n-tnietof was to secure the hi-liest elli- 

 and the least possible weight (i.n-i^tent \\itl 

 apparatus capable of \\iiti-ian.nn_' the ,. 

 unlimited amount .f _-, thai i 



avoidable under sm-h cireiiin- 



ploys 10S cells, each weighing 2? pound-, and 



the* total weight of the i ai... nt ::.' 



pound-. In a test run a round irip.if !> n 



made in thirty-live minu'e-. Thi- indud. 



eral complete stop-, t \\o c..n-id 



eral railroad crossings, and a Ion- l.rid.u'e. It w 



evident that 'JO or 'J.') mile- an Imur was 



within t he capacity of this car. It m; 



car miles, and no repairs were necessary 



for the or lor the motor, the on 



newals rc<|uind having been a new set 



bon brushes. The total expenses fi.r 



was $2.50, all of which was expended upon the 



trucks. It i- believed that a car 



operated at a cost not exceeding 8 cents a n 



With the advent of storage Latin 

 service, the danger from rioter- wil 

 diminished, t'nder the trolley svstem. a 

 broken \\ir-' may disable an entire lin< 

 while if each car is provided with an independ- 

 ent storage battery a separate attack will 

 necessary for each car in order to efiV 

 sale stoppage. 



Electric Traction. The end c.i 

 saw 0,000 miles of electric railway of different 

 types in operation in the United States and 

 < fanada. The rolling stock in. lud- 

 with 850,000 horsepower, and the populat 

 per mile of track was 8,200. In contra 

 this, in all Kurope there were at la 



'><) miles in o[>eration, with 1,260 cars and 

 24,700 horse power, and this with a p. p 

 PIT mile, of track of 765.000. < id-many lea 

 with 190 miles ; Great Mritain follows with 



with 60^ Austria-Hungary with '' 

 Italy with ir>. The re-t <.f the 40 i 



up of small line- scattered through the 

 variou- nation^. The |-jiL r li-h quota lies i 

 in *J lines, in London and Liverpool. 



N< u Knilding Material. Spec jm- 

 glass building blocks, or glass bri<-k-. a- 1 1 

 popularly called, have been introduced in I 

 and (Jermany, it is reported, with saii-f. 

 results. They are hollow blown, very li^i 

 strong enough to serve many architectural pur- 



p - -. l-'or dome-, it is believed they \v 



peculiarly adapted, since their lightness wil 

 largely in their favor as contra-fed with brick 

 or stone, and they will admit u modifie-. 

 from sun and sky that will be very pi* 

 In like manner they may be used for wall 

 spaces where absolute solidity is not requii 



