PREPARING McQUEEN’S INOCULATOR 
"pVERY step in the preparation of McQueen cul- 
tures is under the strict supervision of a compe¬ 
tent bacteriologist. 
All McQueen Cultures are grown from select root 
nodules taken from plants produced by the very 
finest Legume Seeds. 
The McQueen Laboratory and Greenhouse are not 
used exclusively for producing cultures, but are also 
used for control, checking, testing, research and 
development. 
Careful SELECTION of the proper type of 
nodules has been a common practice in McQueen 
Trial Grounds for many years. 
Tap Root (Type A) nodules were being selected 
by McQueens long before their importance was gen¬ 
erally recognized. Quality in an Inoculant can be 
as pronounced as quality in seeds. 
McQueen’s select strains have this uniform qual¬ 
ity and efficiency because they are produced by a 
highly developed exclusive process which has been 
used successfully for over twenty-five years. This 
process is used in addition to the more generally 
known laboratory method. 
McQueens have long known that a few organisms 
of a select strain are more efficient as an Inoculant 
than greater numbers of inferior strains, yet we 
concentrate these select strains just as densely 
as inferior strains can be concentrated. 
THE McQUEEN “CARRIER” 
' I 'HE McQueen “Carrier” is distinctly different 
from that in general use. It is a clean, brown 
colored preparation that does not soil hands or 
clothing when using. Does not contain soot, muck, 
lampblack, charcoal or other disagreeable coloring 
matter. 
McQueen’s does contain colloidal clay, which is a 
natural environment for nitrogen-fixing organisms, 
and keeps them at their highest efficiency without 
additional excess amounts of liquids, special foods, 
or chemicals that may cause trouble later on. 
Another outstanding advantage of the McQueen 
“carrier” is its ability to hold moisture uniformly 
over a greater period of time. McQueen’s Inocula- 
tor mav feel dry. but it contains more hygroscopic 
moisture than is apparent to the touch. 
