CHOICE OF OBJECTIVES FOR REGULAR WORK. 211 



would even then be but a few dollars " saved," with the 

 tact staring you in the face that you would lose all your 

 practice with an adjustable glass. This you must have, 

 and from the very start. 



The author thus dwells on this matter because he feels 

 that it is one of deep interest to many. It is one, also, 

 that he has given particular attention to, that he might 

 be able to advise others intelligently; and he is not 

 without reason to hope that the information he has thus 

 tried to convey in the simplest possible language will 

 be to many worth more than the cost of his little book. 

 He is aware, that in writing the last page or two, he 

 has been practically repeating the tenor of what has 

 before been written; but nevertheless he is strong in 

 the faith that more than one of his readers will have no 

 fault to find with him on this score. To those about 

 purchasing an outfit of objectives he would further say 

 that the advice here given is precisely what he has given 

 to scores of enquirers during the past six years, every 

 one of whom have expressed their satisfaction in a man- 

 ner not to be mistaken. Let the reader, however, be 

 reminded that w r e live in an age of progress, and that 

 it is quite probable that the instructions offered here at 

 this date may at no distant day require essential modifi- 

 cations. Doubtless improvement will continue to follow 

 improvement in the future as well as in the past : the 

 genius of our American opticians is such that anything 

 in the way of progress successfully accomplished seems 

 to render them more restless than before, and in view 

 of this, to use a nautical phrase, we advise the reader 



