26 HEAD. 



tively than that which is used for the security of a 

 brick wall. 



B. There seems to be no species of contrivance 

 but what is exemplified about this admirable archi- 

 tecture — and the more remarkable in the present 

 case, as there can be no natural tendency in the pres- 

 sure of the walls of the head to create tie pieces upon 

 each side, but the reverse : as well might we say, 

 that the pressure of the dome of St. Paul's Church in 

 London, has made the double chain which encompas- 

 ses it around the bottom to hinder it from spreading. 



T. And you are aware this is the very object we 

 have in view, to show a creative Intelligence by dis- 

 playing actual and original purpose and contrivance, 

 in our frame, such as can only be referred to design. 

 You may mention some other particulars respecting 

 this wonderful mechanism. 



A. The head is lined with a thick, firm mem- 

 brane, called the dura mater, and this lining is also 

 lined with a thinner membrane termed the pia mater, 

 — pia, (from one of the meanings of the word), ten- 

 der, affectionate. 



B. Then, there is a softer wrapper in contact 

 with the brain, and a firmer one upon the outside. 



T. Precisely the same mode we adopt ourselves, 

 in packing a precious article of which we wish to be 

 very careful. 



B. Excepting the danger of some great violence, 

 against which no security could avail, it does not seem 

 possible to conceive what more could have been done 



