KNOWLEDGE 



[Oct. 2, 1885. 



iBiiv 5nl)fntoie(* Column. 



IW 



■Sf/rc 



■il'lion of such of the many 

 In our readers. Where it 

 is quoted, to enable those 

 c the specification from the 

 ii-Iane. We shall, generally 

 ; luti- 



e which, 

 's utility 



happens that an article comes under our 

 although not quite novel, is worthy of mention 

 amd ingenuity. In such a cane we should not hei 

 our readers to it. And while tve thus increase the interest oj 

 our pages, we at the same time assist the inventors by giving 

 greater publicity to their inventions (Knowledge being a popular 

 magazine) than is accorded by ''^ •" 



St excellent i 



HEATINCJ BURKEK. 



(Patent No 7,121. 1884.)— In this invention, by Mr. S. Siadaway, 

 o£ 9, George-street, West Bromwich, a plate is fi.xcil just above the 

 frame as shown, leaving a snjall orifice all ronml between the tw<. 



A 





ot „is to be 1.,'nitecl Gas is -iipphul tluougli 

 1^ through a hole beneath the inlet jet fui 1' 

 Inn one gas inlet jet may be use il 



POLARIMETEE. 



!,fi99, 18S4.]"-Tn this instrument, patented by TIio 



ical metlioils, uud when pioiicily mountud i.s said to 



^-^^^ 



eye. The hilE wave phte of quartz irqmi . ]<\\t 



ofthewoikman and i lnactlcall^ unoltui i I he 



accompanying lUu tiation shows a clu | j- i ilii.s 



system it is graduated with \erniei to ic i 1 in i. . .ui I lia.s 

 an adjustment to vary the illumination of the field. Another 

 instniment with rackwork adjustments is also made Tlie .adv.antages 

 of the instrument arc decrease of cost, and the fact that mono- 



to .1 cui.ic.l i,.ui u|„ :, u:,,.. ; ,u ih>, Upturn .,1 Ihr lubc a ball valve 

 is arraiigud, opcuin„' downwards only. When the plunger is forced 

 down among the clothes the included air closes the valve, and is 

 forced through them. 



expose the glued j.aii. to iIil lifihi. ihu prupoilioii u. uiohiuui 

 will vary with circumstancus ; but for most purposes about o 

 fiftieth of the amount of glue will suffice. 



Mr. B. A. Proctor's Lecture Tour. 



1. LIFE OP WORLDS 



2. THE SUN 



3. THE MOON 



i. THE UNIVERSE. 



5. COMETS AND METEORS 

 G. THE STAR DEPTHS 



7. VOLCANOES. 



8. THE GREAT PYRAMID. 



.rofnsely illus 



Communications respecting terms and vacant dates should be 

 addressed to the Manager of the Tour, Mr. JOHN STUART, 

 Royal Concert Hall, St. Leonards-on-Sea. 



Oct. 2, Chester ; Oct. 3, 17, Malvern ; Oct. 6, 9, 12, 13, Ply- 

 mouth ; Oct. 7, 10, 14, IG, Torquay; Oct. 19, 22, 28, Salisbury; 

 Oct. 21, 26, 29, Southampton; Oct. £3, 27, 30, Winchester. Oct. 31, 

 Marlborough College. 



Nov. 2, Chester ; Nov. 3, 5, 7, Southport ; Nov. -4, Burnley ; 

 Nov. 9, Stafford ; Nov. 10, Streathara ; Nov. 12, Middlesbrough : 

 Nov. 17, Darwen ; Nov. 19, Saltaire ; Nov. 23, Bow and Bromley 

 Institute ; Nov. 24, Trowbridge ; Nov. 25, 28, Bath ; Nov. 26, 30, 

 Clifton. 



Dec. 2, 5, Bath ; Dec. 4, Clifton ; Dec. 7, 8, 9, Croydon ; Dec. 11, 

 Chester; Dec. 14, Dorchester ; Dec. 13, Weymouth; Dec. 16, 17, 

 18, 19, Leamington. 



Jan. 12, Hull; Jan. 15, Stockton; Jan. 20, Bradford; Jan. 27. 

 Busby (Glasgow). 



Feb. 3, Alexandria; Feb. 4, Rothesay; Feb. 5, Chester; Feb. 

 6, 20, Malvern; Feb. 9, 12, 19, Cheltenham; Feb. 10, Walsall; 

 Feb. 11, Wolverhampton; Feb. 15, Upper Clapton; Feb. 18, 25, 

 London Institution ; Feb. 22, Sutton Coldfield. 



March 1, 3, 5, Maidstone; March 3 (afternoon) and March 6 

 (afternoon), Tnnbridge Wells. 



Contexts of No. 204-. 





