Statljilcs. 329 



gree of heat as will not injure the paper. It is alfo very 

 durable., may be kept long before it is put to the fire, and 

 will retain its colour long afterwards. It confifts of ful- 

 phuric acid, and three times the quantity of water mixed 

 together. 



" The thing is fo fimple that I can hardly think it can be 

 new : it was, however, unknown to me till I difcovered it; 

 and if it has not before been publiflied, it may amufe fome 

 of your readers. 



" There is one inconvenience attending this ink, which is 

 common to all of this nature : it injures the parts of the 

 paper on which the letters are written. All thefe inks owe 

 their property to fome corrofive fubftance, which being a£ted 

 upon by the fire, renders the writing vifible, by reducing thofe 

 parts of the paper on which the ink has been applied, to a 

 kind of charcoal. 



" Cambridge, March 29, 1799. J* D.'* 



STATISTICS. 



Lift of the Births, Deaths, and Marriages, in feveral 

 countries and cities of Europe, for 1798. 



Abo in Sweden 



Amflerdam 



Auo-fburo- 



Berlin 



Copenhagen 



Florence 



Franckfort on the Mayne 



Gothenburg in Sweden 



Groningcn 



The Hague - • 



I Iamburgh 



Hanau 



I lirmanftadt in Tranfylvania 



Konigfberg 



Bona. 



3IO 



6406 



998 



6206 



3351 

 3406 



999 

 460 



960 



35 J 2 



434 



392 



2203 



DUd. 



260 

 4769 

 1 163 



5136 



37*7 

 1696 



j 002 



347 



646 



1466 



3842 



358 



374 



2134 



Pairs 

 married. 



IOO 



23*3 



335 



IO70 



2238 



3IO 



157 

 308 



5$3 



1492 



117 



116 



59 1 

 London, 



