Pes«npMoD pf . ^'k'^ f^VjI^ re?crvc?Ir of the lamp rests. To thi? brass hcop at^ 



a Ijrfip by fixed ^hrce arrovys, of gilt brass, at equal distances i'rom each 



Ajtd. " C?tber. These arrows, which are 6 inches in length and /^ pf 



^n inch in diameter, are in a horizontiil position, on the outer 



aide of the hppp, and in the direction of three radii drawn fr^oi' 



its centre. 



Tq these three arrows, at the distance of 3 inches from tlje 

 hoop, q.re fastened the ends of three chains of gilt copper, each 

 of 28 inches in length, by which the hoop that receives ^1:^6' 

 . JU nip is suspended. 



Xhese ^fro\ys serv* the purpose of separating the cikainsfi-Qqi 

 «;ach other, in oitJcr that the lamp may be removed occasion- 

 ^Uy, ^nd replaced, without deranging the chains. 



For a lamp with four \yicks, which serves to light a largtf 

 drawng-room, the gilded hoop that receives the lamp has six 

 arrows, to which ar« attached six chains ; but in order to be 

 4ble to remove *nd replace the lamp, there is one of the chains 

 which, being, attached to its ^rrow by a small hook, it is de- 

 , tached occasionally and laid aside, in order to allow a pass:ige 

 for the lamp. 



The gilded hoop which receives the lamp is ornamented 

 w;ith pendants of cristal; and from the lower edge of the hoop. 

 Immediately behind the cristal ornaments, there descends a 

 hoop of white crape, of the same diameter as the hoop of brass, 

 and 4^ inches in breadth, which serves to disperse and soften 

 the direct rays of the flames of the lamp. 



To reflect a part of the. rays that mount towards the ceiling, 

 in o;der to destroy the shadows that m'ight be formed undef 

 the lamp, there is a conical reflector of white craix;, which, 

 resting on the three tubes that conduct the oil from the reseE- 

 ^oir to the wicks, surrounds and conceals the tubes of gJaMth^t 

 contain the flames. 



This reflector is I2-j inches in diameter below, 5-| inches ip 

 diameter at its opening above, and 6 inches high. 



The chief difficulty to be overcome in tlwc construction qf 

 this lamp was to contain the oil in the reservoir in such a man- 

 ner that it should not be in danger of being spilled in taking 

 the lamp out pf the hoop, ia which it is suspended, in carrying- 

 it from one place to another, and in replacing it. Several a?- 

 tcmpts iiad alr«ady been made, by different j>er3ons>. tp. cpij-^ 



struct 



