60 BULLETIN 815, U. S. DEPARTMENT OF AGRICULTURE. 
large crops, averaging only slightly below the trees of the Lisbon 
strain in the investigational plat. This combination of high pro- 
duction and heavy individual fruits which grow very rapidly and 
I AWE; RAGE EMOHE CE OET MEA Acta 
77 OEW STAPF. ..-----.---7CE7 Fm 
SL ALD AGEL ELS FT a a ASF E 
(O LOWEST PRODUCING. ....-#L9O SS ee ee ee 
OPPESPECIVVE OF STR N) 
22 LISGOW STFHMM,0.nannnaas 6 28S a ee ee 
SES AKWZEAWAADICT IVE STRHIV AZ2Z/ | 
7O LUCHEST /HODICIVG._------ ASA. 
CREEL CTWE A STH) 
FS SORTING. STM. 2-2. - FSO? ESS 
hie VERE fh EET TYG, Vi ee wee ZISI SS 
Fic. 9.—Diagram showing the average weight per fruit of the Lisbon lemon of the Green and Tree-Ripe 
grades borne by the trees of the various strains occurring in the investigational performance-record plat. 
These weights are expressed in ounces and are based on data for the 4-year period from July, 1913, to June, 
1917, inclusive, except as noted in Table I. 
are thick skinned is probably due, in part at least, to the excessively 
vigorous and rapid growth of the trees of this strain. 
Figure 10 shows the average seed content of the fruits of the 
various strains In the Lisbon investigational plat. The fruits of 
TREES | MUETACE NMUMBL OF SLEDIE LL 
SSR OLIV. SAGO ne oR eae 507 ees 
00 4UGHE ST (PPOOUCING ...------- 
CRPESPLOTVLE PF SI PPA) 
VLE L SIS LOE. 4 
PF SAUTIWVG eee Rigg se = | 
70 LOWEST PRODUC OUVC: __..------ 26/ 
(RESPECTIVE GF STP?) 
8 2NMSE ~ UM ROC SHUN 7 
Fig. 10.—Diagram showing the average number of seeds per fruit found on lemon trees of various strains of 
the Lisbon variety in the investigational performance-record plat. This is a summary of the data re- 
corded during the 3-year period from July, 1913, to June, 1916, inclusive, except as noted in Tabie XI. 
the Open strain averaged 5.07 seeds, while those of the Dense- 
Unproductive strain averaged only 1.67 seeds. The data show that 
a seed content of about 4.39 is characteristic of the Lisbon strain. 
