The Surveyor and municipal engineer . ction with the prtijectcdinstitution, or otherwi.^e to make arrangements wherebymedical officers of health and medical practilioners in Londonconld obtain, at Ih expense of tlie county, tho examinationby a competent biicteriologiHt of materinl from susiKcted casesof infectious disease, will, a view to oiding in Ihe those authorities which have aliciidy pr<inouncod infavour of the project «re tho vestries of Shoreditch andSt. Pancras. 406 THE SURVEYOE AND MUNICIPAL [September 23, isqs. PREPAYMENT ELECTRICITY METERS. As various corporatioL
The Surveyor and municipal engineer . ction with the prtijectcdinstitution, or otherwi.^e to make arrangements wherebymedical officers of health and medical practilioners in Londonconld obtain, at Ih expense of tlie county, tho examinationby a competent biicteriologiHt of materinl from susiKcted casesof infectious disease, will, a view to oiding in Ihe those authorities which have aliciidy pr<inouncod infavour of the project «re tho vestries of Shoreditch andSt. Pancras. 406 THE SURVEYOE AND MUNICIPAL [September 23, isqs. PREPAYMENT ELECTRICITY METERS. As various corporatioLS iu the conntry have evinced con-siderable interest in the system of prepayment meters, andas one or two have practically decided to adopt encli an ar-rangement, it will be interesting to describe a practicalform of it at present on the market. It is known as theBastian prepayment meter, and is the result of numerous ex-periments from various forms. This prepayment arrange-ment does not imply a special form of meter, for the device. Fig. 1. can be to any of thj vvi-U-known types of meterThe illnstrations by which we shidl endeavour to explainthe working of the inslrument show the prepaymentmechanism applied to a Thomson watt-mctcr. The operationof the instrnmeut, by means of a coin, is an interesting andingenious one. Until a coin is inserted the handle, whichprojects from the cover, is free to move; a coin, when pressedthrough the slot, falls inio a groove, and forms a rigid con-nection between the handle and the interior mechanism, anda turn of the handle switches on the current. The arrange-ment of tho meter will be better appreciated by referring lothe detailed parts. Fig. 1 shows the meter and prepay-ment attachment entirely enclosed, the form in which the
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgreatbritain, bookyea
