606 Of the Salubrity of Warm Bathing. 



two walls being each the width of brick in thickness, 

 and the void space between them being likewise of the 

 same thickness; viz., about 4^ inches. In order to 

 strengthen these double walls, they may be braced and 

 supported one against the other, by uniting them in 

 different parts by single bricks laid across, with their 

 two ends fixed in the two walls. 



Instead of a floor of boards, these two little rooms 

 should be paved with 1 2-inch tiles or flat stones, laid 

 in such a manner, on thin parallel walls (4^ inches in 

 thickness), as to form horizontal flues under every 

 part of the pavement. 



There should be no door of communication between 

 these rooms ; but each should have its separate entrance 

 from without, by a door opening directly into a sepa- 

 rate narrow, descending, covered gallery. These two 

 doors should be placed on the same side of the build- 

 ing ; and their two separate descending galleries may 

 be parallel to each other, and may indeed be covered 

 by the same roof. 



They may together form one gallery, divided into 

 two narrow passages by a thin partition wall con- 

 structed with bricks. 



A small porch at the bottom of the gallery should 

 be common to both passages ; but each passage should 

 nevertheless have its separate door at its lower extrem- 

 ity, where it communicates with the porch. 



The top of the door-way of this descending passage 

 at its lower extremity must be at least one foot below 

 the level of the pavement of the rooms. 



This passage may be furnished with a flight of 

 steps, or its descent may be made so easy as to render 

 steps unnecessary. 



