Profound thrombocytosis in a patient with iron-lack anemia.

Platelet counts in excess of 1 million/cu mm are generally associated with a primary hematologic disorder such as a myeloproliferative syndrome. We describe a patient whose thrombocytosis (platelet count 1.6 million) was due solely to iron lack, and whose platelet count rapidly returned to normal with iron repletion. Clinicians are encouraged to consider reactive causes of thrombocytosis when evaluating platelet counts in excess of 1 million.

Lunar soil: size distribution and mineralogical constituents.

The lunar soil collected by Apollo 11 consists primarily of submillimeter material and is finer in grain size than soil previously recorded photographically by Surveyor experiments. The main constituents are fine-grained to glassy rocks of basaltic affinity and coherent breccia of undetermined origin. Dark glass, containing abundant nickel-iron spheres, coats many rocks, mineral, and breccia fragments. Several types of homogeneous glass occur as fragments and spheres. Colorless spheres, probably an exotic component, are abundant in the fraction finer than 20 microns.