HOSACK ON THE LAWS OF CONTAGION. £39 



©ur dwellings ; and, at the same time that they are ornamenting our 

 cities by the erection of magnificent buildings, and the introduction of 

 other important improvements, they should also avail themselves of 

 every opportunity which may present of widening our streets, and of 

 reserving squares and other pieces of ground to be ever kept vacant, 

 as among the most effectual means of preserving the health of our 

 citizens, and guarding against the propagation of contagious diseases. 



to Tlt\tt9-ytK.hi, etgyer ctfxurov, 

 " Best is Pelasgic empty" 



was wisely expressed by the Pythian oracle; thereby denoting that 

 every large and populous city, as well as Athens, should have its pelas- 

 gics, or vacant pieces of ground, as so many reservoirs of pure air, 

 for the purpose of counteracting the effects of contagion when in- 

 troduced. 



DAVID HOSACK. 



