Kindergarten culture in the family and kindergarten: a complete sketch of Froebel's system of early education, adapted to American institutions. For the use of mothers and teachers.

Mode of access: Internet

Primary methods; a complete and methodical presentation of the use of kindergarten material in the work of the primary school, unfolding a systematic course of manual training in connection with arithmetic, geometry, drawing, and other school studies,

Mode of access: Internet

The education of man ;

Translation first pub. in 1887.A translation of Froebel's "Menschenerziehung", first pub. in 1826.Mode of access: Internet

Atomically Defined Monocarborane Copper(I) Acetylides with Structural and Luminescence Properties Tuned by Ligand Sterics

The weakly coordinating cluster [CB11H12]− is used as a versatile building block for the preparation of luminescent copper(I) complexes. Treatment of [CB11H11‐12‐C≡CH]− with CuI and ammonia affords {(CB11H11‐12‐C≡C)2Cu4(NH3)3}n (2). Addition of selected phosphine and pyridine ligands transforms 2 to a range of homometallic products 3–13. All compounds have been characterized by X‐ray crystallography, which reveals a surprising variety of structural complexity featuring cores with two to ten Cu+ centers. In the solid state, products 3–13 exhibit room‐temperature phosphorescence across the visible spectrum in colors from blue to deep red. Lifetimes at room temperature are in the microsecond regime, and quantum yields of up to Φ=0.99 are observed