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Description
Jenaer Jahrbuch zur Technik- und Industriegeschichte 2010, Band 13Der 13. Band des gut eingefhrten Jahrbuchs fr Technikgeschichte bringt wieder viel aus der Zeit der glorreichen Jenaer Industrie vergangener Jahre: Die Geschichte der Polarisationsmikroskope, Otto Eppensteins revolutionre Erfindung eines Messgertes fr groe Lngen, sowie einen Bericht ber die Geschichte der Entdeckung zahlreicher Planetoiden mit dem weltgrten Schmidt Teleskop in Tautenburg bei Jena. Weitere Aufstze betreffen den Nachweis schwchster
Der 13. Band des gut eingeführten Jahrbuchs für Technikgeschichte bringt wieder viel aus der Zeit der glorreichen Jenaer Industrie vergangener Jahre: Die Geschichte der Polarisationsmikroskope, Otto Eppensteins revolutionäre Erfindung eines Messgerätes für große Längen, sowie einen Bericht über die Geschichte der Entdeckung zahlreicher Planetoiden mit dem weltgrößten Schmidt-Teleskop in Tautenburg bei Jena. Weitere Aufsätze betreffen den Nachweis schwächster Lichtquellen in der Astronomie, Konstruktionsprobleme besonderer Schwierigkeit, die Geschichte der Glocken in Jena, Apolda und Umgebung, die Versuche in Brandenburg optisches Glas zu erschmelzen und neue Erkenntnisse über die Geschichte der Zeissschen Kleinplanetarien. Ferner gibt es einen Aufsatz über Entwicklungen zur ophthalmologischen Technik in der Schweiz und einen spannenden Bericht über Versuche zur Aufklärung der gewaltigen Festigkeit von Spinnenfäden in einem Jenaer AkademieinstitutShipping Notes
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4.3 ★★★★★
Based on 254 reviews
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Product Reviews
★★★★★ 5
EVERY DOG NEEDS THIS BUDDY!!!
Our golden doodle never leaves a room without it. Perfect size for our 20 lb golden doodle baby!! So soft yet so durable. Our pup sleeps with it every night. So quiet too!!! We ordered a backup in case but have yet to need to because of the amazing quality!!!
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Reviewed in the United States on January 20, 2026
★★★★★ 1
Durability sucks dont buy
I purchased the Mellow Duck dog toy specifically for its supposedly durable construction, hoping it would provide at least a few weeks of entertainment. Unfortunately, the toy was completely shredded and destroyed within 24 hours of its arrival.
For a product marketed as suitable for dogs, the material quality is extremely poor and clearly not designed to withstand even moderate chewing or play. This was a significant disappointment and a total waste of money. I cannot recommend this toy for any dog, as it offers zero long-term value.
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Reviewed in the United States on October 14, 2025
★★★★★ 2
Not sturdy toy
Toy was not as big as we thought it would be and in addition the dog ripped it up within 2 weeks. Expensive for not lasting very long.
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Reviewed in the United States on March 29, 2026
★★★★★ 3
Not for heavy chewers.
Does not hold up to our german shepherd. If you have a large dog be aware the seams will separate. But this is our dogs favorite toy. We gad to buy two within 6 months.
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Reviewed in the United States on June 3, 2026
★★★★★ 4
Not for playing tug!!
Great toy, but we played tug with it and one of his flippers came off. It is great when my MBT just shakes it! Don’t recommend playing tug!
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Reviewed in the United States on March 2, 2026