k; 
CoLOKADO Expi:rimpint Station 
stor-age i)otatoes of the Rural New Yorker variety, which were prac- 
tically free from dii't aud which had been in the storage cellar for 
over a month, were placed in barrels where they remained undis- 
turbed during the remainder of the storage period. The barrels were 
set on the dirt floor of the cellar. The tops of the. barrels were 
covered with sacks. The temperature of the cellar Avas kept below 
40° V. with the relative humidity ranging between 80 and 90 per 
cent. The weight on November 30, after being transferred to the 
barrels, Avas 2,097 pounds. On April 3 they Avere again weighed 
at Avhich time a loss of 23 pounds, or 1.1 j3er cent, Avas recorded. 
Since they Avere surrounded by a comparatively moist atmosphere 
the surface evaporation was reduced to a minimum, therefore the 
losses may be attributed largely to respiration. 
PER CENT OF MARKETABLE TUBERS 
In order to compare the different varieties under experiment 
Avith respect to the proportion of marketable tubers Avhich they 
produce, the Aveights from all plats of each Amriety in the variety 
test Avere summarized and the percentages determined. The results 
are shoAvn in Table 7. 
TABLE 7 
Per Cent of Marketable Tubers. Computed from Weights of Marketable Tubers 
and Total Weights after Sorting in Tables 1, 2, 3 and 4 
A^ariety 
Y ears 
of Test 
Number 
of Plats 
Marketable 
Tubers 
Per Cent. 
Pearl 
1 Q1 A— 1 Q1 S 
AQ 
cn 0 
Peoples 
-L .7 X fj X .7X0 
1915 
4 
oU o 
91 .4 
Rural New Yorker 
1915-1918 
38 
95.7 
Russet Rural 
1916-1917 
6 
96.9 
Green Mountain 
1915 
4 
92.2 
Charles Downing 
1915-1917 
10 
84.7 
Early Ohio 
1915-1916 
6 
84.4 
Late Ohio 
1915-1917 
8 
84.2 
Irish Cobbler 
1915-1917 
10 
90.8 
Peachblow 
1915-1916 
4 
89 7 
Russet Burbank 
1915-1916 
8 
72.2 
Garnet Chili 
1915 
2 
91 .8 
Tins table shows very clearly the varietal diffei’ciices in the 
percentage of mai'ketable tidjers i)roduced. The Auirieties Avhich 
lead in this j'espect ai*e the Rural Ncav Yoi'ker and the Russet Ruiad. 
1 hese are closely related Auuleties belonging to Ihe same grouj). 
The lowest ])ercentage Avas obtained from the Russet Burbank. This 
n as i)robably due in ])art to tln^ fact that the tubers arc com])ai*a- 
