WHAT TO DO WITH OUR SEAWEEDS. 137 



beyond a day or so, lest it leave chequered marks upon 

 the surface of the weed, especially those with broad 

 fronds, like Delesseria. 



Experience will give the best lessons. Some sea- 

 weeds, such as IlelogJoia, which are glutinous, must 

 not be pressed at all, but laid out to dry, and when 

 perfectly so, then moisten the under side of the paper, 

 and give a gentle pressure only 



Others will not adhere to paper, and therefore, when 

 dry, brush them over with a little isinglass dissolved 

 in gin (laid on warm), and they will then be fixed 

 closely to the cardboard or paper. 



Another preparation is : one ounce oil of turpentine, 

 in which some gum mastic the size of a nutmeg has 

 been dissolved. This gives a gloss to the specimen 

 and helps to preserve the colour. 



You must change the blotting paper and muslin at 

 least twice during the process of drying larger sea- 

 weeds ; the smaller ones will be ready in a couple of 

 days for the album, on the second day giving heavy 

 pressure by stones and weights besides the strap. 



CONCLUSION. 



In this little Manual I have restricted myself to 

 the Seaweeds I know to be most valuable to a young 

 collector for album or fancy work, and by no means 

 offer it to my scientific friends, who have access to the 

 expensive and complete works of Harvey and Landes- 

 borough. In compiling it, I have written from my own 

 collection, and looked into the tide-pools day by day. 



