The "1946 Dominion Experimental Farms / Jubilee Anniversary / 60 years service to Agriculture" float. The map of Canada was made by coating donna conna board with glue and using cereal grains such as corn, wheat, oats, etc. glued to the various provinces.

Comparison of the number and the vigor of seedlings developed from enclosed and open-pollinated panicles of Poa pratensis suggested that some reduction in both vigor and number of seedlings may result from bagging to control pollination. However, these differences appeared to have uncertain significance. Generally, no important differences were found in adult plant variation between progenies from seed derived from enclosed and those obtained from open-pollinated panicles.

In the present paper the difference in yielding ability of two genotypes which differ by only one single gene is compared : Na Na (bourbon) and Na na (murta). 20 plants of each of 14 murta (Na na) progenies were used for comparison after discarding all na na plants which are dwarfed and practically unfruitful; each progeny was made of 10 Na Na and 10 Na na individuals. The individual yields were recorded during 8 years (1939 to 1946) and it was shown that the na allele, besides its well known effect on the morphology of the leaves, has a remarkable influence on the yielding capacity of the Na na plants, reducing it, in average, to only 55,9% as compared with the Na Na genotype. The Bartlett's test of homogeneity of variance when applied to study the variability between the plants of the bourbon and murta groups has shown that both groups are homogeneous, but a significant difference between their variances was found, the bourbon one being larger. The same test when applied to study the variation between the annual yields of the same groups of plants has led to the same conclusion. The Na na plants however were more suceptible to the die-back of the lateral branches after harvest, which even caused the death of several plants. Considering that fruit size and weight of both varieties (bourbon and murta) are practically identical, it is concluded that the lower fruit number of the murta genotype is responsable for its lower yields. As its flowers are normally fertile, pollen being produced in abundance, it is supposed that a lower number of internodes, or a lower number of flowers in the inflorescences or even a lower total number of flowers in each leaf axil is responsable for the decrease in yield of the murta variety. The results of this study are also of practical importance suggesting the elimination of all murta plants in a coffee plantation and their replacement by bourbon.

<abstract language="eng">I - Short description of the species. II - Analytic key of the trees. III - List of the species collected with register number and author's number. SHORT DESCRIPTION OF SPECIES - This section includes a short morphological analysis of the species and the study of their geographic distribution, locality, habitat and regional zonation. ANALYTIC KEY OF THE TREES - The author was obliged to make a morphological key for his use on account of the great difficulty met in identifying the species in the field. LIST OF SPECIES COLLECTED WITH REGISTER AND COLLECTOR'S NUMBERS - As the majority of the species from Ilheus are paratypes of the types described in "Flora Brasiliensis" it was decided to publish this list. The author's chief objective was to call the attention of specialists tothe undetermined material with a view to interesting them in studying it.

The essay debates a wide range of subjects reflecting Huxley's views towards the direction of society at that time. He puts forward a number of predictions, many of which resonate far beyond the time when it was written.

The potential usefulness of the airplane for the transportation of agricultural commodities cannot be measured solely in the tonnage of perishables it can carry. | Transport aircraft should be considered in terms of potential carry capacity under modern methods of operation rather than as a specific number of planes. The strides the airline industry has made in economies of operation and in the utilization of equipment have increased the carrying capacity of air transportation during the last few years.