208 PROCEEDINGS OF THE QUEKETT MICROSCOPICAL CLUB. 



A hearty vote of thanks to Mr. Harris was carried by acclama- 

 tion. The President then called on Mr. R. Paulson to read his 

 paper on " The Microscopical Structure of Lichens." 



Mr. Paulson in his remarks on the subject-matter of his paper 

 laid great stress on the importance of careful and accurate micro- 

 scopical manipulation in the research into lichen histology. He 

 pointed out the necessity, very often overlooked, of paying great 

 attention to the illumination in critical work of this kind. Much 

 attention had been paid in the past years to the description and 

 classification of lichens, and as this part of the subject is ap- 

 proaching finality it leaves the field open for the histologist. In 

 -his paper he gave the results of his own researches and indicated 

 further lines along which fruitful work might be done. It was Mr. 

 Paulson's intention to show -a series of photomicrographs made 

 from his preparations, for which he is indebted to the courtesy and 

 help of Mr. J. H. Pledge, and then demonstrate some of the con- 

 clusions he had arrived at. Unfortunately the lantern failed to 

 act after the general photographs of lichens had been shown. Mr.. 

 Paulson kindly promised to show the lantern slides at the next 

 Oossip Meeting on June 22nd. 



