Apparatus for the Description of Curves. 1 57 



CIRCULATION OF PERIODICAL WORKS, 



The Government of Columbia, in one of their late laws, 

 have gone beyond any other in facilitating the circulation of 

 public papers, under the impression that it is a powerful means 

 of promoting knowledge among the people. The following 

 are the two principal articles of one of their late decrees. 



" Article 1. Newspapers and periodical works, as well na- 

 tional as foreign, whatever may be their number and weight, 

 shall pay no postage in the post-offices, and in the jiost con- 

 veyances of the Republic. 



*" Article 2. National pamphlets and other printed papers 

 shall also enjoy the same exemption in the ordinary post con- 

 veyances, provided that die entire volume of the work does not 

 exceed four ounces in weight. If, however, the package of na- 

 tional prmted papers exceeds the above weight, it shall pay 

 the ordinary postage to the contractor for the conveyance." 



JOPLING's apparatus for the DESCRIPTION OF CURVES. 



A most ingenious and useful apparatus for the production of 

 curved lines has been invented by Mr. J. Jopling, 24 Sonierset 

 Street, Portman Square. We hope to notice it further in our 

 next number. It apjiears likely to be highly interesting to the 

 Mathematician, and useful in various branches of the Arts. 



removal of a BRICK HOUSE ENTIRE. 



Instances of successful ingenuity like the followhig ought to 

 be made generally known, for imitation. 



^ -' « 2s'e\v York, 4th June. 



"In certain improvements, by widening Maidenlane, it was 

 necessary that the house No. 85 should be pulled down or re- 

 moved a distance of 2U feet fi-om its former front. The house 

 is Uiree stories high, 25 feet wide, and 45 in depth — has a 

 slated root; and is a valuable buikling. The project of re- 

 moving it was conceived and undertaken by Mr. Simeon 

 Brown, who has before removed about 20 buildings, some of 

 them built partly with brick, and in some instances without 

 disturbing the families or removing the furniture. This house, 

 built entirely of brick, was estimated to weigh about 350 tons, 

 and was removed, with all the chimneys, windows, doors, &c. 

 standing. Being previously placed upon li.viijs, the removal 

 was commenced yesteiday morning, and was performed by 

 three bed-screws in the liont, each of which was worked by 

 two or three men. — What was deemed the most difficult part 

 of the undertaking was, that the house must be raised about 

 two feet iVorn its former foundation : this was however done by 

 two other screws plated uiuierneath, which raised the buiUhiig 



gradually 



