28 FLOWERS THAT NEVER FADE 



heat, it was manipulated under the simplest 

 conditions and with the least complicated 

 appliances. The secrets which Professor 

 Goodale was not allowed to share were 

 concerned chiefly with the preparation of 

 the more fusible kinds of glass, the means 

 of coloring it, the use of cements, and the 

 methods of annealing. Professor Goodale 

 was told that part of the color was imparted 

 to the glass while fused, part added while 

 the glass was cooling, ' and part placed on 

 afterward. The artists also showed him 

 that all the colors were permanent, and 

 that they were not affected by light. 



Twice during this period the younger 

 Blaschka applied for permission to suspend 

 his work and visit America for study. The 

 first time was toward the end of 1891, when 

 he asked for a leave of absence of six 

 months. As soon as he arrived in Cam- 

 bridge, in 1892, he began to study the plants 

 in the Botanic Garden, the Arnold Arbo- 

 retum, and the Bussey Institution. When 

 the spring opened he went to Jamaica, and 

 later on to California for the purpose of 

 collecting material. On these trips he se- 

 cured a number of specimens, and made 

 analyses and over two hundred drawings 

 in color of the more interesting species. 

 Returning to Cambridge, he spent a short 

 time there in further study and in repairing 



