Jar Street Lamps ^ according to the Lengths of the Nights. 1 1 9 



number of Nights are, answering to 26 servings in the first, and 

 27 in the last period : in a common year, when one odd night 

 occurs at the end, equal to 12^ 8™ ; but in a Leap-year, two such 

 days will occur, and (including IS*" 4"" for the 29th of February) 

 will amount together, to 25*' 12 ". If the common Year be thus 

 considered, in serving Quarters, of 13, 13, 13, and 14 servings 

 each, respectively, they appear, from so casting the Table, to be 

 a* follows, viz. Nights. H, M. 



l-3t. 73 1048 2 



2d. 68 1048 59 



3d. 101 1068 22 



4th. 123 1094 1!) 



365 4259 42 

 The great inequalities of the different usual Quarters of a 

 ttonimon Year, will appear from the following statement, viz. 



Quari-ei-s. 



1st. From 29th Sept. to 24th Dec. 

 2d. From 25th Dec. to 24th March 

 3d. From 25th March to 23d June 

 4th. From 24 June to 2Sth Sept. . . 



Nights. 



Sura of Do. 

 H. M. 



1273 31 



1278 47 



806 17 



901 7 



365 1 4259 42 

 Whence it appears (and the same is not sufficiently known to 

 persons in general) that the legal Quarter, for Rents, Kates, &ic. 

 ending at Michaelmas in any common Year, contains 10 more 

 Days(and Nights) than the followingQuarter ending atChristmas; 

 whilst the two first Quarters of the Year, ending at Lady-day and 

 Midsummer, are equal to each other, in number of Days (and 

 Nights) in Leap-years, and they diflfer but one Day in common 

 Years; and yet, so unequal are the collective lengths of the Nights 

 in the latter case, that the first of these Quarters requires, more 

 than half as much more Lamp-light, as the latter!: and of the 

 other two Quarters, 87 Nights of one, require more than one- 

 third as much more Lamp-light, as the 97 Nights, in the other of 

 these Quarters ! Again, 



The Summer Half-year 

 The Winter Half-year 



Fioui these labt numbers it appears, that the public Lamp- 

 Contractor's 



