X PREFACE. 



for persons, without trying to define the mutual afiinities of 

 those bearing the same name. It is hardly necessary to insist 

 upon the need of searching all entries likely to give the 

 information sought; thus, if an inquirer do not find his 

 wants satisfied when referring to ' Materia Medica,' he should 

 look up cognate headings, such as * Drugs* and 'Medicinal 

 Plants.' 



I should have been glad to include a complete series of 

 references to consular reports, also the selections of Indian 

 papers bearing on Vegetable Technology, but I found I could 

 not attain even approximate completeness therein. Consular 

 reports are often quoted in The Pharmaceutical Journal^ whence 

 they are cited here, and a good series of the Indian selections is 

 to be found in the Library Catalogue of the Royal Geographical 

 Society. These publications are often regarded as ephemeral, 

 and the department responsible for their issue rarely has a 

 complete set. 



Parliamentary papers have not been quoted in full, for in 

 the majority of cases their value is commercial or manu- 

 facturing; in the Index, however, I have made references to 

 suggest paths which may be followed up by those who want 

 more than I have given. The formulae ^ Refer to^ and * Refer 

 also to' signify something outside this volume, whilst ^8ee' 

 and ' See also ' are ordinary cross-references. 



The rules of the Index Society are followed in their spirit, 

 the article preceding a name being used in the alphabetical 

 arrangement, so that *De YrijV and similar Dutch names, 

 figure under the article, with a cross-reference from the sub- 

 stantive following. As in the Guide to the Literature of 

 Botany f modified vowels and diphthongs are spelled out, a, o, ii, 

 becoming ae, oe, ue, and so forth. 



