APARTMENTS AND FURNITURE. 179 



the smallest passages, into which the larger pas- 

 sages lead, terminates in a little hollow cell. 

 Some of the cells are indeed larger than others, 

 but they are all very minute, so much so that 

 many anatomists formerly doubted their ex- 

 istence. 



The most correct resemblance of these pas- 

 sages and cells or little rooms would, in my 

 opinion, be a very thick branch of some shrub, 

 very full of the minutest berries you can con- 

 ceive of, and without leaves. But you must 

 not. forget to think of the shrub as hollow through 

 all its branches and twigs quite into the cells, 

 and as divested of its leaves. 



This, however, you are to remember, will 

 not give you a correct idea of the whole lungs, 

 but only of the little tubes and cells for carry- 

 ing and holding air. 



In order to make the shrub, in the case 

 above mentioned, look like real lungs, I must 

 cut the extremities of the twigs, till I bring the 

 bush into the right shape ; then I must inter- 

 weave something like spiders' web or cotton 

 among all its branches, &c., and thus fill up 

 all the space ; and lastly, I must cover the 

 whole with a pale red, but very thin covering. 



